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Einstein predicted that the suns gravity would bend starlight as it passed the sun.
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Professor Stanley Eddington confirmed Einstiens theory.
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The center of the Milkey Way is 60 light years from the sun
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Dr. Hubble took hotos of "spiral nebulae"
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Andromeda was 100million light years away
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Three types of galaxies Hubble identified were spiral, irregular, and elliptical.
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Walter Baade took pictures of Andromeda
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Type 1 stars are brighter bluer and lie in open clusters
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Two theries are the big bang and the steady state
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Arno Penzias and Robert Willson accedentally found radiation from the big bang
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Astronomers measure speed of stars by looking at their light spectra
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Astronomers found that the amount of light is not what we accpect from so much matter
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The universe started as a dense ball of energy
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IF dark matter was not present the gas would quickly dissipate
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The new discoveries of cephied variable stars and type 1 cupernovea is better than Henrietta Leavitt because we can see them at greater distances
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Dark energy - 73% atoms- 4% dark matter 23%
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Dr. John C Mather is a NASA scientist who discovered cosmic microwave backrounds
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CMB is thr remaining light from the beginning of the universe
