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everything in nature from the most

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distant quasar to the coldest chunk of

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cometary ice shines in a particular

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wavelength of light depending on its

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temperature many phenomena in the

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universe cannot be seen with the naked

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eye hot objects such as Paul SARS or

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dying stars emit gamma rays and x-rays

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while cold objects such as stars being

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formed emit light in the infrared these

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wavelengths can only be detected with

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very sophisticated instruments placed

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above our atmosphere to observe the full

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spectrum of light NASA plans to place an

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orbit around the Earth for Great

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the first of the four observatories will

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be the Hubble Space Telescope the most

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complex and powerful astronomical

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once in orbit the Space Telescope will

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see the sky in all its splendor stripped

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of the murky veil of Earth's atmosphere

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at the heart of the telescope is its

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near perfect 8-foot mirror it took two

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years for perkin-elmer to grind college

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and coke this single piece of glass

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capable of focusing light that began its

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journey through space 10 billion years

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ago you can think of the Space Telescope

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as a time machine because the speed of

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light is flying on it it takes time for

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light to get from there to here okay if

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we're looking at an object that's 10

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billion light-years away which is about

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as far as space telescope can see and

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define what is singing we're seeing an

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object whose white left at 10 billion

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years ago the universe is believed to

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have begun about 15 billion years ago in

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an explosion called the Big Bang since

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then everything in the universe has been

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moving away from us will galaxies and

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the billions of stars they contain keep

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getting further and further away or will

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everything eventually contract Space

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Telescope will provide the first real

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answers to these questions images of the

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planets will be ten times clearer than

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those taken by the best earthbound

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telescopes in use today they will be

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similar to those relayed by the robotic

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spacecraft Voyager during its brief

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encounter with the planets but Space

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Telescope during its 15 year lifespan

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will be capable of studying these

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objects over an extended period of time

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it's fine guidance sensors can point for

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a period of 24 hours with a stability of

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seven milliseconds according to NASA's

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director of astrophysics dr. Charles

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pellerin if you were to take a laser in

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Washington and aim it at New York City

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where the accuracy instability of seven

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million seconds you could have a person

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stand on a World Trade Center and hold a

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dime that laser would never depart from

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that time and this is what the device

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that's very large weighs about 24,000

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pounds as wheel spinning has motors

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meeting antennas turning with all this

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activity

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device will still point to any place in

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space with that decision quasars are

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probably the most distant objects in our

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universe they have an energy output a

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thousand times our whole galaxy yet all

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this energy appears to be coming from a

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point of light the size of our solar

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system where is all this energy coming

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from looking at this and other mysteries

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will be the second of the great

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telescopes the gamma ray observatory

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there are some theories that say the

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energy coming from quasars may be caused

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by a huge black hole sucking up whole

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stars and then somehow spitting the

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energy back out the third of the Great

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observatories the advanced x-ray

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astrophysics facility will study violent

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events of this nature which emit vast

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amounts of x-rays we see cataclysmic

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violence high energy is going on in

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almost every Astrophysical object it's

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x-ray astronomy through a sensitivity to

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the sort of million degree temperatures

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that are caused by hot cazness that

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really record the violent events parlor

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the universe we see a whole raft of

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fascinating activity that a uniquely

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x-ray field the last of the four Great

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observatories the space infrared

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telescope facility should complete our

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new view of what is going on in the

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universe its domain the very coldest

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objects in the sky where stars are born

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and planets begin to form

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NASA's four Great observatories pushing

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technology into the 21st century to

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provide a new more complete picture of