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He was an ancient Greek philosopher and scientist. He believed that stars are perfect circles. He believed that earth was the center of the earth.
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Believed that earth is the in the center of the universe. He said that the stars, planets, sun, and moon move together.
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He believed that the earth revolved around the sun,and that the earth spins on the suns axis once a day. This is called the Heliocentric, or sun-centered system.
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Tycho was a danish astronomer. he measured and studied the positions of the stars. He discovered the star called "Cassiopeia"
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He was a dutch inventor. He invented the telescope, and the microscope.
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He was a German astronomer who discovered the three laws of planetary movement. these are the three laws he discovered: Law of orbit was when all the planets move elliptical orbits, with the sun at one point. The law of periods was the square of the period of any planet is equal to the orbit. The law of area is a line that connects a planet to the sun sweeps out equal areas at the same time.
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Galileo was the first person to use the telescope. he found that the moon is smooth, and round just by looking at it.
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He discovered saturn's moons.
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He created a modernized telescope. Newton also helped develop spectral analysis. newton created the laws of gravitation and calculus.
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William discovered a planets while using a telescope. he also discovered galaxy's while observing the sky's.
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he discovered 793 Arizona. he also discovered that there was life on mars. he found that there is vast canals on mars.
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He discovered radio waves emanating from the Milky Way.
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He discovered that the galaxy's distance and that it's moving. He helped discover the idea of the universe. Hubble also discovered the Hubble law. The Hubble law is that astronomical objects in the universe travel away from each other.
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Albert is known for many things. one being the theory of relativity. he also discovered the link between mass and energy, the theory of light, and the Brownian movement.
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It was a spacecraft and it was the first artificial satellite placed orbit around the earth.
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He was the first man in space. He is celebrated as a hero for the first man in space. He went after they launched a satellite (sputnik) and his mission began.
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he found that each planet has its own color and brightness. he found the luminosity/brightness of each star.
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It was designed to land 6 humans on the moon, and bring them safly back.
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it took place April 12, 1981.
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It was launched December 4, 1996 and landed on mars July 4, 1997. it was designed as a technology demonstration of a newer way to deliver a lander and robotic rover to mars.
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He was a spacecraft commander, and the first man to walk on the moon.
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He was the first American to orbit around earth. He was one of the Mercury 7 to go to space. His mission was the Mercury-Atlas 6.
