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in florence italy in the year 1609

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the world changed

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using a small telescope galileo proved

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that the earth is not distinct from the

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universe but part of it

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and he showed that there is much more to

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the universe than we see with the naked

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in the 20th century astronomers made

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another revolutionary discovery that

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optical telescopes reveal only a portion

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telescopes sensitive to invisible

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wavelengths of light have detected

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microwave radiation from the big bang

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infrared radiation from protoplanetary

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disks around stars

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and x-rays from explosions produced by

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black holes

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we have booster ignition and liftoff of

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columbia reaching new heights for women

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and x-ray astronomy

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the most powerful x-ray telescope ever

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began its exploration of the hot