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welcome to a virtual tour of the Hubble

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Space Telescope our window to the stars

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Hubble which launched into space in 1990

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circles the earth 15 times a day

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gazing into our vast universe coming in

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at about the size of a school bus

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Hubble flies 340 miles above Earth's

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surface it travels at a speed of about 5

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miles per second

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Hubble's position beyond Earth's

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atmosphere gives us a clear view of

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cosmic objects the Hubble Space

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Telescope has several science

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instruments that allow us to study light

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behind these doors you'll see the Space

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Telescope imaging spectrograph the

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advanced camera for surveys and the

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cosmic origins spectrograph Hubble can

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see visible ultraviolet a near-infrared

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light with these instruments scientists

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observe these different wavelengths of

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light to learn about chemical content

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temperature density and motion this

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light can help us learn about the

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evolution of galaxies stars dark energy

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and dark matter now you see the Wide

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Field Camera 3 this instrument was

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upgraded on the last servicing mission

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to Hubble and is the most

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technologically advanced instrument on

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board coming to the top of the telescope

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you can look down and see Hubble's two

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mirrors which are made of special glass

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with reflective coatings the large

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primary mirror collects cosmic light and

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reflects it to the secondary mirror the

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secondary mirror bounces the light back

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through the hole in the primary mirror

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and into the telescope's instruments as

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a safety precaution

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Hubble's aperture door can close to

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prevent sunlight from entering and

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potentially damaging the telescope or

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its instruments that glowing ring is

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Hubble's soft capture mechanism it will

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allow a robotic mission to safely move

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Hubble out of orbit when the telescope

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retires you can also see two large solar

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panels the panel's collect sunlight and

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convert it to electrical energy which is

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then stored in batteries and used to

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power the telescope Hubble also has

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three fine guidance sensors that allow

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the telescope to Point lock onto and

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measure the position of stars once light

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is processed the antennas beam Hubble's

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images and data to communication

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satellites then those signals are sent

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to stations on the ground the ground

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stations transmit the data to NASA's

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Goddard Space Flight Center in Greenbelt

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Maryland after it's processed

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scientists will study this data and

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share their findings with the world we

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hope you enjoyed your tour of the Hubble

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Space Telescope for more information