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29 Cards in this Set
- Front
- Back
circling; it takes the Earth 365 days to do this around the sun |
orbit |
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the ILLUSION created by the Earth's rotation and revolution that makes it appear as though the Sun and the other stars are moving around the Earth |
apparent motion |
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the imaginary line that connects the North and South Poles; the Earth rotates on this |
axis |
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a recognizable pattern in the stars, such as Ursa Major or Cassipeia |
constellation |
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large, round holes on the surface of a moon or planet, normally created by a meteorite impact |
crater |
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a very large group of stars |
galaxy |
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a force that pulls two objects toward each other |
gravity |
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a large rocky or metallic object from space that hits the surface of the Moon or Earth |
meteorite |
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the galaxy in which our solar system is located |
Milky Way |
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the northern half of the globe |
Northern Hemisphere |
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the different shapes of the moon as it progresses through a one - month cycle, as seen from Earth |
phase |
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the movement of an object around another object; for example, it takes the Earth one year to make one of these around the Sun |
revolution |
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to travel in an orbit |
revolve |
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to spin on its axis; for example, it takes the Earth one day to make one of these |
rotate/rotation |
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the year-long cycle of temperature changes caused by the Earth's tilt as it revolves around the Sun |
season |
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a set of planets, moons, asteroids, and comets that are held together by the gravity of a star |
solar system |
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the southern half of the globe |
southern hemisphere |
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a device used to magnify and see objects in space |
telescope |
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the regular rise and fall of oceans caused by the Moon's gravity |
tides |
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the time it takes for a planet to make one complete turn on its axis |
day |
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the line where the sky and Earth's surface seem to meet |
horizon |
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the time it takes for a planet to make one full trip around the sun |
year |
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an object that orbits a star and does NOT shine with its own light |
Planet |
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varies in sizes and made up of brightly shining gases; a huge ball of hot gases that gives off its own light |
star |
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a natural object that orbits a planet; a natural satellite and is not man-made |
moon |
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the four small, rocky planets closest to the sun in our solar system; Mercury, Venus, Earth, and Mars |
inner planets |
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the four large, gaseous planets farthest from the sun in our solar system; Jupiter, Saturn, Uranus, and Neptune |
outer planets |
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a large rock in outer space; some can be very large and some are as small as a grain of sand |
asteroid |
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a star or bright object in space around which other objects orbit |
Sun |