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16 Cards in this Set
- Front
- Back
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What was the Heliocentric theory?
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The theory that the Sun was the center of the solar system.
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What was the geocentric theory?
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The theory that the Earth was the center of the solar system.
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What were the major accomplishments of Aristarchus?
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He believed that the Sun was the center of the Solar System. He also estimated the distances to the Sun and Moon from Earth.
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What were the major accomplishments of Copernicus?
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He also found that the sun was the center of the solar System. He knew a lot about science but his findings were never accepted until he died.
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What were the major accomplishments of Kepler?
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the speed of a planet's orbit depends on its distance from the sun. came up with the three laws of planetary motion,
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What were the major accomplishments of Galileo?
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He made a telescope and found that saturn had rings, jupiter had moons and venus shows phases. He made a pendulum, showing that the earths spin on its axis was costant
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what were the major accomplishments of Newton?
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He discovered gravitational force and orbital period of the moon.
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what were the major accomplishments of Ptolemy?
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he believed in the geocentric theory. with known planets orbiting around.
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Rotation?
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Rotation is the Earth spinning on its axis (24h)
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Revolution?
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the Earth Orbiting around the sun
(1 year) |
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Precession?
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the movement of the rotational axis
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What causes the phases of the moon?
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The orbit of the moon around the Earth. (24h)
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whats a lunar eclipse?
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When the moon passes behind the earth and the earth blocks the moon from getting the earths light. This is caused when a full moon, the earth and the sun are lined up.
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whats a solar eclipse?
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When the moon passes in front of the earth, blocking the earth from the suns light. this occurs with a full moon lining up with the earth and the sun.
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what is the soil like layer on the moon called?
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Regolith
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what are the lunar features?
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Just after the formation of the solar system, a body the size of mars collided with Earth, ejecting large amounts of earth and the body, creating the moon.
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