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Hans Lippershey invented the telescope. He was a spectacle maker.
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Galileo looked at the night sky through a telescope. He discovered that Jupiter was a planet and there were moons revolving around it. He also found that the earth was not the center of the Solar System.
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Isaac Newton invents a telescope that uses mirrors instead of lenses. It produces much clearer images than the telescopes with lenses.
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Herschel makes a large telescope by hand. He discovered Uranus
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The Mt. Wilson observatory is founded by George Hale. It hosts the world's largest telescope until 1949. The observatory in in California.
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Edwin Hubble discovered that everything in the universe is expanding away from a point. Other galaxies appeared to be red- which meant the light waves were being stretched and the galaxies were moving away. This discovery fueled the big bang theory.
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Two scientists Penzias and Wilson detect radiation in space. At first they thought their instruments were malfunctioning, but they realized it was actually energy leftover from the big bang.
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THe Hubble Telescope is launched into space. It takes high resolution images of things in space. Hubble observations have led to discoveries such as the rate that the universe is expanding.
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WMAP (Wilkinson Microwave Anisotropy Probe) is launched into space. It measured the difference in temperature of Cosmic Background Radiation across space.
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Kepler was launched to discover Earth-like palnets orbiting other stars. It was named after astronomer Johannes Kepler
