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wise is the wide field infrared survey

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explorer

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wise is going to find hundreds of

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millions of objects spread over the

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entire sky and for us that's like a

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treasure map

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we think there are about as many grains

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of sand on this beach as there are stars

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in the entire universe so the task of

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finding rare objects in the universe

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that we're interested in requires the

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maps that wise is going to make

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it's a bit like using this metal

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detector here to try to find gold coins

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that are buried in all of this sand

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wise consists of a fairly modest size

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telescope about 40 centimeters in

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diameter that would sort of fit under

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your arm

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wise is going to survey the entire sky

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in four infrared wavelengths over six

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all sky surveys are one of the basic

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tools that astronomers use to find

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interesting and unusual objects it's

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sort of like the gps of astronomy

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one of the most exciting things that you

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expect to find with an all sky survey

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likewise is the unexpected we expect

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surprises things that we have no idea

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one of the projects wise is going to be

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doing is studying the population of

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near-earth objects these are asteroids

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and comets whose orbits get close to

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earth's orbit now this doesn't

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necessarily mean that they're going to

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hit the earth but we do want to pay some

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attention to them with wise we'll be

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able to tell something about how many

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there are what their sizes are and what

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they're made out of whether they're soft

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and crumbly like this ball of sand or

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solid rock like this rock right here

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in visible light an object that's small

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and shiny reflects the same amount of

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sunlight as an asteroid that's big and

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dark

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but when we look with an infrared

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telescope we're seeing heat that's

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emitted from more sides of the asteroid

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so we get a much better true measurement

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of the object's size

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and this is important because it allows

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us to tell whether or not we're dealing

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with an object that's this big or an

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the maps that wise is going to be

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generating can be used to find all sorts

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of rare and unusual objects one of these

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objects is the most luminous galaxy in

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the entire universe

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but finding it is about like trying to

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find one particular grain of sand on

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one of the other rare types of objects

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that wives may find is possibly the

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nearest star to our sun

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we think that there's a good chance that

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our sun actually does have a closer

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neighbor than we already know about and

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it's likely to be a very cool type of

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star called the brown dwarf the

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temperature may be room temperature or

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even colder maybe as cold as an iceberg

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with wise we expect the unexpected we're

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looking for new surprises and new

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discoveries and with this exciting

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survey we're going to be finding a

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treasure trove of discoveries that