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when we look up at the night sky we can

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only see a small percentage of the stars

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that are around us that's because our

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telescopes on earth have helped us get a

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better view of the stars by collecting

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more light than our eyes can see

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but the view from those telescopes gets

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distorted by earth's atmosphere that's

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to get rid of the distortion of the

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atmosphere astronomers imagine building

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a telescope the size of a school bus to

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go into space

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the result was the hubble space

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telescope launched in 1990

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today it orbits the earth 340 miles

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many of the galaxy's hubble photographs

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are millions of light years away from

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earth

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light years are a measurement for

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distance in space related to the time it

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takes light to travel from one place to

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another a light year is the distance

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light travels in one year

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hubble photographed the whirlpool galaxy

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that is 25 million light years away from

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earth

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the light from that galaxy took 25

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million years to travel to earth

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this means that the light hubble seas

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from the whirlpool galaxy is 25 million

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years old

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we aren't seeing the galaxy as it exists

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today

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we're seeing the galaxy as it existed 25

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a hubble astronomer had a really

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interesting idea to point hubble at an

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apparently blank spot of sky

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that empty patch of sky

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turned out to be filled with galaxies

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much more distant than we'd ever seen

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before

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some of the galaxies were baby galaxies

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born just after the creation of the

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universe in the big bang

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the universe is a never-ending source of

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wonder largely because of the things the

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hubble space telescope has taught us

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hubble studies our own solar system

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like storms on mars

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and aurora on jupiter

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hubble also photographs the birth and

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death of stars

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and has uncovered thousands of new

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galaxies in the universe