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[Music]

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comets and asteroids are truly the time

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capsules of our galaxy with many of them

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dating back to more than 4 billion years

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ago these prehistoric treasures hold the

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lost tales about the origins of our

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solar system and luckily we are slowly

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starting to unravel its story

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missions like nasa's osiris-rex and jack

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says hybus hivasua ii are providing

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insight into the history of our solar

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system and even how life began on earth

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so what's next hello and welcome to

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another virtual episode of nasa science

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live i'm your host tahira allen and

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today we're talking all about one of

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nasa's upcoming asteroid missions lucy

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the first spacecraft to study the trojan

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asteroids which orbit the sun in two

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groups one in front of jupiter's path

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and the other behind it

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once launched in october 2021 the

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mission will complete a 12-year journey

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to seven different trojan asteroids that

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may hold vital clues to deciphering the

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history of our solar system but before

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we get started let's take a deeper look

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[Music]

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great so now that we learned a little

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bit more about this exciting mission

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let's talk to some of the experts behind

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it i am thrilled to be joined today by

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dr adriana ocampo lucy program executive

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at nasa headquarters

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dr kathy olkan deputy principal

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investigator for southwest research

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institute and jessica thompson project

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systems engineer at nasa goddard ladies

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thank you all so much for being here

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today and to kick things off could you

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help us understand a little bit more

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about what a trojan asteroid is

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yes thank you for that question

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um

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let's see if we go back in time to a

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point about four and a half billion

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years ago

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when the early solar system was

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could have seen a dense cloud

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interstellar dust then this dust would

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have

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collapsed and formed the solar nebula

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which started to speak ensure by the

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gravitational force

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and that is what grabbed that material

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and started forming the

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the early planet solar system

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and the trojans are really the remnant

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of that

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planetary formation process that form

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planets like jupiter's saturn action and

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venus

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we are very excited that uh

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for the first time we're going to go and

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explore a solar system

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uh with a loose emission in this epic

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voyage of 12 years

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and the lunch countdown has already

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started we are only at 10

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um

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10 months and 12 days from the opening

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there are thousands of asteroids out

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there and lucy will fly by them between

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300 and 600 miles away

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allowing us a close-up view of all the

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detail on the surface

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these asteroids are in a unique position

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in that they are clustered in jupiter's

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orbit at the lagrange points

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lagrange points are places in space

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where objects tend to stay put due to

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the gravitational pull of two large

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masses nearby

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the forces on these small bodies put

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them in equilibrium

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meaning they're trapped in place

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allowing lucy to fly to them and image

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and one of the really intriguing aspects

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of the trojan asteroids is that they're

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a diverse population

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from astronomical observations they

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appear to be just a point of light but

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that's enough information so that we can

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see

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some of the surface properties like

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color and surface composition and we can

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see that there's a wide range some

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trojan asteroids are more red than

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others for example

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and this is an image of two of our

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trojan targets that lucy will go and

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visit this is patroclus and menacious

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this image was taken with the hubble

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space telescope and these targets are

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really interesting because

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they are a binary system and they're

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about the same size so they orbit a

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wow so what we already know is

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fascinating and i'm wondering why is it

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important for a mission like lucy to

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study them

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well the diversity of the trojan

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asteroids is a clue that they really had

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a very interesting history if they were

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formed in the location we find them in

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today we would have expected a much more

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uniform population

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but

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we don't see that and there's some

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current theories of

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uh modern solar modern theories of solar

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system formation that involve the

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migration of

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giant planets away from the sun and this

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causes a chaotic disruption of the small

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bodies in the solar system

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and we believe that this caused some of

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these bodies to be ejected from our

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solar system and others to be trapped in

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these lagrange points

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forming the trojan asteroids that we see

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and for these reasons over the course of

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12 years we're going to visit seven

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spacecraft so to add to

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what kathy just mentioned

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um you know one of the key questions

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that we have in planetary science is

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what is the molecule of water and the

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organic material that sparked the life

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as knowledge in our planet came from

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and asteroids hold the key to these

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questions and by studying the trojan

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asteroids the loose emission will shed

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light to this enigmatic

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question on how

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life may have arrived to earth

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lucy will not only investigate the

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trojan asteroids composition but it will

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also

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be able to inform the relative age and

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the chronology on how the processes

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happen in the formation of the solar

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wow i mean this is all super incredible

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and so jessica i actually heard that the

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name lucy has a tie to the beatles um

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and i was wondering if you could

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elaborate on that

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yeah it absolutely does lucy is named

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after the hominin skeleton fossil that

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was discovered in ethiopia by donald

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johansen

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and upon discovering this skeleton

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the team celebrated looking to the stars

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while playing the beatles song lucy in

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the sky with diamonds

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which led to the name of the fossil

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and just like the discovery of this

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skeleton taught us about the origins of

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humanity the lucy asteroid mission will

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teach us about the origins of the solar

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well i mean lucy has a very big task at

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hand it sounds like and i'm wondering

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what are some of the instruments that um

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the mission has to complete this

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that's a great question

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so although we can't see the

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characteristics of the trojans very well

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from the ground lucy has five cameras on

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board that will capture close-up images

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in different wavelengths the lorry

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instrument will take pictures in the

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visible spectrum

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similar to your iphone camera but more

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sophisticated

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which will allow this mission to be able

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to get a great view of the geology of

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the surface

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lucy also has a thermal camera named

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tess

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that will take pictures of the

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temperature on the surface similar to

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seeing a body heat picture of yourself

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and our third camera is kind of a two in

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one camera called ralph which takes

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infrared and visible color images by

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scanning the surface of each asteroid as

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and also we have a

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very interesting experiment

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on board the

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the spacecraft that we call the gravity

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experiment we actually use

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the hygiene antenna that you can see

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here the encircle the circle in silver

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and this is in a collaboration with the

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germany german space

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agency

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uh and these the gravity experiments

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will help us determine the mass of the

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trojan

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asteroids as the lucid spacecraft fly by

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them

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this is a very sensitive

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experiment that will

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enable

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to determine

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any deviation on the spacecraft

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trajectory as it flies by the trojan

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asteroids

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and

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in that way will determine the mass of

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or or the amount of matter that there is

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in these objects and from there their

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density

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and we also have two terminal tracking

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cameras on board these are part of the

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guidance and control system of the

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spacecraft but we'll be able to use

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these cameras to collect wide field of

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view images

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as we fly past you can see them at the

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top of this graphic this is our

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instrument pointing platform

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where our cameras reside and it's the

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two small objects round objects at the

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top

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and we will use these

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uh cameras to be able to get the volume

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of the trojan asteroids through imaging

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and

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be able to learn about the density of

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our trojan asteroids

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using all of these instruments together

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we're going to be able to investigate

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the geology the surface composition

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their internal properties and search for

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satellites at these trojan asteroids

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it's going to be a great first

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reconnaissance

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wow and this just sounds like a really

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complex piece of technology and i'm

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wondering how many people work on this

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mission

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tahira that's a great question there's

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approximately 750 people that have been

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involved with this lucy mission

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lucy family is really a big mix of

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engineers

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technicians scientists

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managers and even interns

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our team is truly the key to our success

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and it's been very motivating to work

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with people from multiple organizations

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and universities

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and i'll tell you each and every

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person's role and experience on this

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mission has been vital to designing

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building testing and soon to be

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launching this spacecraft

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wow that is incredible to know that so

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many people come together for one

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amazing object and but i do want to go

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back to an animation earlier in the show

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because it looked like there were swarms

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of trojan asteroids um in front of

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behind jupiter and so i'm wondering if

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we were standing on one of the trojan

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asteroids would we see many of them

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around us

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while these green dots look like they're

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really close together the animation

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doesn't convey how vast and empty space

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actually is

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it wouldn't look like the millennium

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falcon flying through an asteroid belt

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dodging asteroids

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00:13:43,030 --> 00:13:40,880
of the about 5 000 known trojan

287
00:13:45,670 --> 00:13:43,040
asteroids in each swarm they're

288
00:13:48,710 --> 00:13:45,680
separated each separated by about 9

289
00:13:51,750 --> 00:13:48,720
million miles so if we were standing on

290
00:13:54,629 --> 00:13:51,760
a trojan asteroid and looked out at them

291
00:13:56,069 --> 00:13:54,639
at the at the other trojans there we

292
00:13:57,350 --> 00:13:56,079
actually wouldn't be able to see them

293
00:13:59,350 --> 00:13:57,360
with our eye

294
00:14:01,509 --> 00:13:59,360
or at least not many of them because

295
00:14:04,230 --> 00:14:01,519
some of them would be as faint as a 10th

296
00:14:06,470 --> 00:14:04,240
magnitude star

297
00:14:08,629 --> 00:14:06,480
wow okay those movies are very deceiving

298
00:14:11,590 --> 00:14:08,639
uh thank you for putting that input into

299
00:14:13,350 --> 00:14:11,600
perspective for us and so i am seeing a

300
00:14:15,990 --> 00:14:13,360
lot of great questions rolling from

301
00:14:17,509 --> 00:14:16,000
users online and if you are watching now

302
00:14:19,430 --> 00:14:17,519
please don't hesitate to join the

303
00:14:21,110 --> 00:14:19,440
conversation with us submit your

304
00:14:23,030 --> 00:14:21,120
questions in the comment box where

305
00:14:25,910 --> 00:14:23,040
you're viewing from or by using the

306
00:14:28,389 --> 00:14:25,920
hashtag asknasa on social media so

307
00:14:31,110 --> 00:14:28,399
ladies to kick things off i have nope

308
00:14:33,829 --> 00:14:31,120
nope nope on youtube uh jessica i think

309
00:14:36,150 --> 00:14:33,839
this is a good one for you who asks will

310
00:14:38,790 --> 00:14:36,160
lucy be sending data and photos during

311
00:14:44,870 --> 00:14:41,670
yeah great question so lucy has a

312
00:14:47,670 --> 00:14:44,880
two-way light time of about 45 minutes

313
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to send commands and receive data

314
00:14:51,670 --> 00:14:49,519
so we'll have the first images back

315
00:14:54,550 --> 00:14:51,680
within a few hours after flying by the

316
00:14:58,389 --> 00:14:54,560
first asteroid which is your babies will

317
00:15:03,269 --> 00:15:00,550
nice that is so exciting to hear that

318
00:15:04,949 --> 00:15:03,279
they're coming back and so uh kathy i've

319
00:15:06,069 --> 00:15:04,959
got a great one for you

320
00:15:08,629 --> 00:15:06,079
um

321
00:15:11,670 --> 00:15:08,639
sean on youtube asks what is the

322
00:15:14,150 --> 00:15:11,680
composition of a trojan asteroid

323
00:15:15,750 --> 00:15:14,160
well that's a really good question

324
00:15:17,269 --> 00:15:15,760
so um

325
00:15:19,430 --> 00:15:17,279
they

326
00:15:20,870 --> 00:15:19,440
have different spectral types and that's

327
00:15:22,470 --> 00:15:20,880
how we can tell about the surface

328
00:15:23,350 --> 00:15:22,480
composition

329
00:15:25,750 --> 00:15:23,360
and

330
00:15:28,069 --> 00:15:25,760
they look like some of the asteroids in

331
00:15:31,590 --> 00:15:28,079
the asteroid belt we call them uh

332
00:15:33,749 --> 00:15:31,600
there's c d and p type asteroids that

333
00:15:35,509 --> 00:15:33,759
are in the asteroid belt or in the

334
00:15:37,749 --> 00:15:35,519
trojan asteroids

335
00:15:39,189 --> 00:15:37,759
and one thing we really want to know

336
00:15:40,949 --> 00:15:39,199
when we visit

337
00:15:43,990 --> 00:15:40,959
with lucy is

338
00:15:46,150 --> 00:15:44,000
what is the composition is there water

339
00:15:49,110 --> 00:15:46,160
uh near the surface

340
00:15:51,189 --> 00:15:49,120
what other uh what are the densities of

341
00:15:53,189 --> 00:15:51,199
these objects so part of the reason

342
00:15:54,470 --> 00:15:53,199
we're going to visit is really to answer

343
00:15:56,870 --> 00:15:54,480
that question

344
00:15:57,990 --> 00:15:56,880
and from the ground we can see the

345
00:15:59,189 --> 00:15:58,000
overall

346
00:16:02,790 --> 00:15:59,199
uh

347
00:16:05,509 --> 00:16:02,800
composition of the surface but to see

348
00:16:09,509 --> 00:16:05,519
surface details that aren't resolved

349
00:16:10,870 --> 00:16:09,519
will really need to send a spacecraft

350
00:16:13,269 --> 00:16:10,880
so actually kathy i've got a great

351
00:16:15,110 --> 00:16:13,279
follow-up to you so john on facebook

352
00:16:18,629 --> 00:16:15,120
wants to know will we know where the

353
00:16:22,310 --> 00:16:20,310
that's a good question and we're going

354
00:16:23,509 --> 00:16:22,320
to be trying to answer that question and

355
00:16:27,910 --> 00:16:23,519
by looking

356
00:16:33,269 --> 00:16:31,030
stable at further distances from the sun

357
00:16:35,509 --> 00:16:33,279
if we can find those on the trojan

358
00:16:38,470 --> 00:16:35,519
asteroids that's going to be one key

359
00:16:39,189 --> 00:16:38,480
clue to where they had originated

360
00:16:45,749 --> 00:16:39,199
the

361
00:16:47,430 --> 00:16:45,759
is going to be something we're looking

362
00:16:51,189 --> 00:16:47,440
for when we fly by

363
00:16:55,189 --> 00:16:51,199
in starting in 2027

364
00:16:57,269 --> 00:16:55,199
nice okay um adriana uh lori jones on

365
00:16:59,509 --> 00:16:57,279
twitter asks if the lucy mission is

366
00:17:01,670 --> 00:16:59,519
successful and provides good data are

367
00:17:04,150 --> 00:17:01,680
there plans for future missions uh such

368
00:17:07,029 --> 00:17:04,160
as lucy's

369
00:17:09,029 --> 00:17:07,039
yes that's a great question because you

370
00:17:11,510 --> 00:17:09,039
know in planetary exploration what we

371
00:17:13,669 --> 00:17:11,520
have learned is usually we fly by

372
00:17:17,990 --> 00:17:13,679
objects by planets

373
00:17:19,429 --> 00:17:18,000
and then the next step is toward the

374
00:17:23,270 --> 00:17:19,439
object or

375
00:17:27,110 --> 00:17:23,280
and then and then to learn so we did our

376
00:17:30,070 --> 00:17:27,120
planning and uh will be having

377
00:17:33,029 --> 00:17:30,080
calls out for by the scientific

378
00:17:35,830 --> 00:17:33,039
community to propose the follow-up

379
00:17:39,270 --> 00:17:35,840
missions to the lucid mission so a lot

380
00:17:41,510 --> 00:17:39,280
more to come this is just the beginning

381
00:17:43,750 --> 00:17:41,520
so i'm interested to know there was

382
00:17:46,549 --> 00:17:43,760
nasa's osiris-rex mission was recently

383
00:17:52,470 --> 00:17:46,559
in the news for its first tag sample and

384
00:17:52,480 --> 00:17:56,230
so the osiris-rex commission

385
00:18:00,390 --> 00:17:57,990
go ahead kathy yes

386
00:18:01,669 --> 00:18:00,400
thank you adriana uh the

387
00:18:03,990 --> 00:18:01,679
the

388
00:18:06,150 --> 00:18:04,000
nasa has a whole suite of asteroid

389
00:18:09,350 --> 00:18:06,160
missions that work together really

390
00:18:12,630 --> 00:18:09,360
synergistically and osiris-rex is one of

391
00:18:15,510 --> 00:18:12,640
them in the upcoming mission uh psyche

392
00:18:17,350 --> 00:18:15,520
to a metallic asteroid is another and

393
00:18:20,710 --> 00:18:17,360
all of these missions

394
00:18:23,909 --> 00:18:20,720
uh really give us different clues about

395
00:18:26,150 --> 00:18:23,919
the not only uh near-earth asteroids

396
00:18:27,830 --> 00:18:26,160
main belt asteroids but also trojan

397
00:18:29,750 --> 00:18:27,840
asteroids so we can really piece

398
00:18:31,909 --> 00:18:29,760
together uh

399
00:18:35,350 --> 00:18:31,919
how the planets in our solar system

400
00:18:39,909 --> 00:18:37,590
thank you for that and so ladies this is

401
00:18:42,150 --> 00:18:39,919
really for whoever wants to take it but

402
00:18:45,669 --> 00:18:42,160
jim bloodworth on youtube asks when is

403
00:18:47,669 --> 00:18:45,679
the launch and on what rocket

404
00:18:51,750 --> 00:18:47,679
oh i'll take that one

405
00:18:54,789 --> 00:18:51,760
we're launching october 16 2021 is the

406
00:18:57,110 --> 00:18:54,799
opening of our launch period and we're

407
00:18:58,070 --> 00:18:57,120
launching on an atlas v

408
00:19:03,590 --> 00:18:58,080
uh

409
00:19:08,950 --> 00:19:05,990
nice cannot wait we are under one year

410
00:19:11,110 --> 00:19:08,960
to launch everyone tuning in so uh okay

411
00:19:13,669 --> 00:19:11,120
here's another one

412
00:19:16,230 --> 00:19:13,679
aaron moose sorry if i'm messing that up

413
00:19:19,070 --> 00:19:16,240
on youtube asks can you see the asteroid

414
00:19:20,310 --> 00:19:19,080
with a telescope

415
00:19:23,190 --> 00:19:20,320
[Music]

416
00:19:26,310 --> 00:19:23,200
yes and i'll i'll take that one

417
00:19:29,510 --> 00:19:26,320
you we can see uh the trojan asteroids

418
00:19:31,750 --> 00:19:29,520
with the telescope and in fact uh

419
00:19:34,310 --> 00:19:31,760
recently we discovered a small moon

420
00:19:37,110 --> 00:19:34,320
around one of our trojan targets that

421
00:19:39,669 --> 00:19:37,120
we're going to uh our first target is

422
00:19:41,350 --> 00:19:39,679
called urabades and we recently

423
00:19:43,350 --> 00:19:41,360
discovered an approximately one

424
00:19:44,310 --> 00:19:43,360
kilometer sized moon

425
00:19:45,110 --> 00:19:44,320
uh

426
00:19:47,590 --> 00:19:45,120
from

427
00:19:48,870 --> 00:19:47,600
uh the hubble space telescope

428
00:19:53,029 --> 00:19:48,880
and so this is

429
00:19:54,789 --> 00:19:53,039
uh an example of being able to see uh

430
00:19:57,350 --> 00:19:54,799
that trojan asteroids through a

431
00:20:00,150 --> 00:19:57,360
telescope and also

432
00:20:02,310 --> 00:20:00,160
uh being able to search and learn more

433
00:20:04,870 --> 00:20:02,320
about these interesting targets before

434
00:20:09,190 --> 00:20:04,880
we get there

435
00:20:13,909 --> 00:20:10,870
that the name of the

436
00:20:17,029 --> 00:20:13,919
um the new moon that was just discovered

437
00:20:17,909 --> 00:20:17,039
uh in is named keta

438
00:20:20,630 --> 00:20:17,919
so

439
00:20:21,909 --> 00:20:20,640
it's it's a new discovery that the lucid

440
00:20:25,029 --> 00:20:21,919
team made

441
00:20:27,430 --> 00:20:25,039
with the cable space telescope

442
00:20:28,710 --> 00:20:27,440
so yes on the topic of discoveries oh

443
00:20:31,990 --> 00:20:28,720
sorry

444
00:20:35,750 --> 00:20:32,000
i just wanted to add um about that name

445
00:20:38,230 --> 00:20:35,760
uh the name is in honor of

446
00:20:41,669 --> 00:20:38,240
uh the first woman who was the olympic

447
00:20:44,710 --> 00:20:41,679
torchbearer and so uh we're really happy

448
00:20:49,669 --> 00:20:44,720
to be able to name this small moon in

449
00:20:53,990 --> 00:20:52,149
wow thank you that is a really fun fact

450
00:20:56,710 --> 00:20:54,000
um and so but on the topic of

451
00:20:59,029 --> 00:20:56,720
discoveries alex mann on youtube asks

452
00:21:00,789 --> 00:20:59,039
can lucy theoretically discover new

453
00:21:05,110 --> 00:21:00,799
asteroids on her way through the

454
00:21:09,190 --> 00:21:06,870
i can go ahead and take that

455
00:21:12,149 --> 00:21:09,200
um it is possible that lucy could

456
00:21:13,029 --> 00:21:12,159
discover uh asteroids

457
00:21:16,470 --> 00:21:13,039
uh

458
00:21:17,430 --> 00:21:16,480
either in the trojan asteroid swarms

459
00:21:19,990 --> 00:21:17,440
uh

460
00:21:21,350 --> 00:21:20,000
or potentially in the main belt but it's

461
00:21:23,590 --> 00:21:21,360
unlikely

462
00:21:24,549 --> 00:21:23,600
our telescopes have a very narrow field

463
00:21:27,510 --> 00:21:24,559
of view

464
00:21:30,549 --> 00:21:27,520
our instruments do and so we won't be

465
00:21:33,430 --> 00:21:30,559
trying to search a broad area to find

466
00:21:35,430 --> 00:21:33,440
new main belt or trojan asteroids the

467
00:21:37,990 --> 00:21:35,440
real purpose is to get our first

468
00:21:39,430 --> 00:21:38,000
close-up look at the trojan asteroids

469
00:21:42,630 --> 00:21:39,440
that we'll be

470
00:21:46,870 --> 00:21:45,270
nice so jessica i want to go back to uh

471
00:21:48,549 --> 00:21:46,880
what you mentioned earlier in the show

472
00:21:50,549 --> 00:21:48,559
talking about how many people worked on

473
00:21:52,230 --> 00:21:50,559
this mission and i'm curious to know how

474
00:21:55,190 --> 00:21:52,240
long have these groups been working on

475
00:22:01,510 --> 00:21:58,789
oh wow uh so the discovery proposal for

476
00:22:03,110 --> 00:22:01,520
this i believe was uh started back in

477
00:22:06,789 --> 00:22:03,120
2014

478
00:22:09,270 --> 00:22:06,799
and lucy was awarded in 2016

479
00:22:14,070 --> 00:22:09,280
and so we've been working as a formal

480
00:22:18,630 --> 00:22:16,070
wow and to all come together in this one

481
00:22:21,270 --> 00:22:18,640
big moment next year that is so exciting

482
00:22:23,590 --> 00:22:21,280
um and ladies i've got a really great

483
00:22:27,590 --> 00:22:23,600
question for whoever wants to take it

484
00:22:33,350 --> 00:22:27,600
rehan on um youtube says will any of

485
00:22:38,710 --> 00:22:35,990
well i can start but i probably lose

486
00:22:39,510 --> 00:22:38,720
cathy could follow up

487
00:22:45,590 --> 00:22:39,520
no

488
00:22:49,510 --> 00:22:45,600
are really quite far away there as we

489
00:22:51,750 --> 00:22:49,520
mentioned in the jupiter's orbit so for

490
00:22:54,630 --> 00:22:51,760
them to be uh if they would have to be a

491
00:22:57,510 --> 00:22:54,640
major collision to deviate their their

492
00:22:59,029 --> 00:22:57,520
orbit to bring them closer to the inner

493
00:23:02,390 --> 00:22:59,039
solar system

494
00:23:04,870 --> 00:23:02,400
so there is no potential of impact from

495
00:23:08,470 --> 00:23:04,880
from the trojan asteroids around the

496
00:23:12,710 --> 00:23:11,110
yeah and i can just add that because

497
00:23:15,830 --> 00:23:12,720
they're in these lagrange points which

498
00:23:17,990 --> 00:23:15,840
are stability zones uh these objects are

499
00:23:20,390 --> 00:23:18,000
not going to escape and then impact

500
00:23:23,029 --> 00:23:20,400
earth and what that also means is that

501
00:23:25,669 --> 00:23:23,039
this is probably uh a specific

502
00:23:28,149 --> 00:23:25,679
population that's not represented in our

503
00:23:29,990 --> 00:23:28,159
meteorite collection on the ground

504
00:23:31,190 --> 00:23:30,000
making it even more important to go

505
00:23:31,909 --> 00:23:31,200
visit these

506
00:23:36,630 --> 00:23:31,919
uh

507
00:23:38,549 --> 00:23:36,640
trojan targets with our lucy spacecraft

508
00:23:40,070 --> 00:23:38,559
so kathy earlier you mentioned that if

509
00:23:42,630 --> 00:23:40,080
we were standing on an asteroid we

510
00:23:45,110 --> 00:23:42,640
wouldn't necessarily see the next one um

511
00:23:46,950 --> 00:23:45,120
right around us and gerald on youtube

512
00:23:50,549 --> 00:23:46,960
asks how long do you think it will take

513
00:23:51,430 --> 00:23:50,559
to go from asteroid to asteroid

514
00:23:53,190 --> 00:23:51,440
oh

515
00:23:55,350 --> 00:23:53,200
that's pretty interesting

516
00:23:58,630 --> 00:23:55,360
we have this really

517
00:23:59,669 --> 00:23:58,640
amazing trajectory that enables our

518
00:24:01,990 --> 00:23:59,679
uh

519
00:24:04,149 --> 00:24:02,000
our voyage through the trojan asteroids

520
00:24:07,430 --> 00:24:04,159
and you can see it here in this

521
00:24:09,590 --> 00:24:07,440
animation this is in a frame rotating

522
00:24:12,549 --> 00:24:09,600
with jupiter and so

523
00:24:15,269 --> 00:24:12,559
uh the blue line is uh the lucy

524
00:24:16,310 --> 00:24:15,279
trajectory and we fly

525
00:24:19,510 --> 00:24:16,320
out

526
00:24:21,590 --> 00:24:19,520
uh do two gravity assists past earth to

527
00:24:23,990 --> 00:24:21,600
pump up our aphelion so that we can get

528
00:24:27,750 --> 00:24:24,000
to the trojan asteroids then we fly

529
00:24:29,750 --> 00:24:27,760
through the l4 swarm visiting uh five

530
00:24:32,390 --> 00:24:29,760
different trojan asteroids

531
00:24:35,190 --> 00:24:32,400
first we visit like i said uh eurobabies

532
00:24:39,110 --> 00:24:35,200
and it's moon ketta and just 30 days

533
00:24:41,190 --> 00:24:39,120
later we fly past palomili but it's not

534
00:24:43,350 --> 00:24:41,200
until years later that we fly past

535
00:24:45,750 --> 00:24:43,360
patroclus and menonicious

536
00:24:46,710 --> 00:24:45,760
later in the l5 swarm

537
00:24:49,430 --> 00:24:46,720
so

538
00:24:54,870 --> 00:24:49,440
uh look forward to encounters with

539
00:25:02,070 --> 00:24:59,390
wow nice for a long time and jessica uh

540
00:25:05,430 --> 00:25:02,080
doggygamer13 on youtube asks how fast

541
00:25:10,870 --> 00:25:07,430
well when we're flying by the trojan

542
00:25:12,710 --> 00:25:10,880
asteroids we fly by between six and nine

543
00:25:15,029 --> 00:25:12,720
kilometers a second

544
00:25:19,269 --> 00:25:15,039
so that's kind of like doing a 10k in

545
00:25:22,630 --> 00:25:21,029
and one thing i'd like you to add to

546
00:25:24,950 --> 00:25:22,640
that is

547
00:25:26,549 --> 00:25:24,960
imagine as we're flying by trying to

548
00:25:29,590 --> 00:25:26,559
take images

549
00:25:31,990 --> 00:25:29,600
at those great speeds and part of the

550
00:25:33,190 --> 00:25:32,000
uh really interesting engineering on

551
00:25:35,269 --> 00:25:33,200
this mission

552
00:25:36,870 --> 00:25:35,279
is those are those terminal tracking

553
00:25:38,630 --> 00:25:36,880
cameras that i mentioned and they're

554
00:25:39,750 --> 00:25:38,640
mounted on an instrument pointing

555
00:25:44,789 --> 00:25:39,760
platform

556
00:25:47,750 --> 00:25:44,799
so that we can remain targeted on the

557
00:25:50,630 --> 00:25:47,760
trojan asteroid as we fly past at such

558
00:25:53,909 --> 00:25:51,990
so kathy

559
00:25:55,830 --> 00:25:53,919
do you know how

560
00:25:58,390 --> 00:25:55,840
how good of resolution are we talking

561
00:26:00,310 --> 00:25:58,400
about with these images

562
00:26:02,549 --> 00:26:00,320
oh the resolution is going to totally

563
00:26:05,029 --> 00:26:02,559
transform our understanding of these

564
00:26:07,029 --> 00:26:05,039
trojan asteroids

565
00:26:10,630 --> 00:26:07,039
our highest resolution images will be

566
00:26:12,310 --> 00:26:10,640
about 14 meters per pixel so

567
00:26:13,909 --> 00:26:12,320
you will be able to see geologic

568
00:26:15,590 --> 00:26:13,919
features on their surface will be able

569
00:26:19,990 --> 00:26:15,600
to count craters

570
00:26:25,029 --> 00:26:23,190
nice and so this is for everyone astro

571
00:26:27,190 --> 00:26:25,039
girl on twitter wants to know why are

572
00:26:31,430 --> 00:26:27,200
there so many asteroids between mars and

573
00:26:37,350 --> 00:26:34,470
well um i can start it and then

574
00:26:38,470 --> 00:26:37,360
i'm sure cathy or jessica can follow up

575
00:26:40,710 --> 00:26:38,480
you know

576
00:26:43,590 --> 00:26:40,720
it's important to note that the trojan

577
00:26:46,310 --> 00:26:43,600
asteroids is a different family from

578
00:26:49,750 --> 00:26:46,320
the ones from the main belt dust

579
00:26:53,990 --> 00:26:49,760
the main belt which reside between

580
00:26:56,390 --> 00:26:54,000
mars and jupiter so and again we have

581
00:26:59,029 --> 00:26:56,400
visited the main belt asteroids with

582
00:27:02,870 --> 00:26:59,039
many other missions and we are planning

583
00:27:06,630 --> 00:27:02,880
to continue that relation is a set of

584
00:27:09,029 --> 00:27:06,640
a family of objects that are extremely

585
00:27:11,350 --> 00:27:09,039
importantly understand the chronology

586
00:27:13,990 --> 00:27:11,360
and the formation of the planet within

587
00:27:16,870 --> 00:27:14,000
the solar system but the trojan family

588
00:27:21,190 --> 00:27:16,880
that as i mentioned is we have mentioned

589
00:27:23,430 --> 00:27:21,200
that it has never been a study and

590
00:27:25,110 --> 00:27:23,440
they are the remnants you know during

591
00:27:27,029 --> 00:27:25,120
the formation of the system there were

592
00:27:27,830 --> 00:27:27,039
great collisions

593
00:27:36,630 --> 00:27:27,840
and

594
00:27:38,630 --> 00:27:36,640
material that did not accrete

595
00:27:39,909 --> 00:27:38,640
sufficiently

596
00:27:42,870 --> 00:27:39,919
to form

597
00:27:45,990 --> 00:27:42,880
all planets so

598
00:27:49,350 --> 00:27:46,000
these dogs that were left over from the

599
00:27:50,149 --> 00:27:49,360
planetary formation uh during

600
00:27:52,549 --> 00:27:50,159
of

601
00:27:54,630 --> 00:27:52,559
you know during the early solar system

602
00:27:57,669 --> 00:27:54,640
and that's why we have so many asteroids

603
00:27:59,750 --> 00:27:57,679
or these objects in the main belt in the

604
00:28:02,310 --> 00:27:59,760
trojans and as well

605
00:28:04,070 --> 00:28:02,320
far far away in the kuiper belt so

606
00:28:05,830 --> 00:28:04,080
they're they're all different families

607
00:28:07,269 --> 00:28:05,840
and they relate and we're trying to

608
00:28:10,149 --> 00:28:07,279
understand them

609
00:28:12,389 --> 00:28:10,159
what the relationship is

610
00:28:13,990 --> 00:28:12,399
thank you so much unfortunately that's

611
00:28:15,430 --> 00:28:14,000
all the time we have for today i feel

612
00:28:18,630 --> 00:28:15,440
like we could talk about this mission

613
00:28:20,710 --> 00:28:18,640
all day adriana kathy and jessica thank

614
00:28:22,870 --> 00:28:20,720
you so much for joining us and for those

615
00:28:24,950 --> 00:28:22,880
tuning in thank you for watching and

616
00:28:27,669 --> 00:28:24,960
thank you for those great questions we

617
00:28:31,190 --> 00:28:27,679
are less than one year away from lucy's

618
00:28:34,310 --> 00:28:31,200
october 2021 launch date and be sure to

619
00:28:36,630 --> 00:28:34,320
visit nasa.gov lucy to for more

620
00:28:38,389 --> 00:28:36,640
information about the mission and if you

621
00:28:40,630 --> 00:28:38,399
want to stay up to date on mission

622
00:28:43,269 --> 00:28:40,640
milestones and activities be sure to

623
00:28:45,990 --> 00:28:43,279
follow nasa's solar system on facebook

624
00:28:52,770 --> 00:28:46,000
twitter and instagram again thank you so