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20 Cards in this Set
- Front
- Back
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orbit
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curved path followed by a satellite as it revolves around an object
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mercury
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smallest planet and closes to the sun.
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maria
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Dark colored relatively flat regions of the moon formed when ancient lava reached the surface and filled craters on the moons surface.
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solstice
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twice-yearly point at which the sun reaches its greatest distance north or south of the equator.
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Project Gemini
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second stage in the u.s program to reach the moon.
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radio telescope
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collects and records radio waves traveling through space.
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equinox
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When the sun is directly over the equator and the number of daylight hours and nighttime hours is the same worldwide.
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space station
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a large facility in space where the astronauts stay when they are on a mission.
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observatory
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building that can hold a large telescope has a dome shaped roof
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waxing(moon)
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describes moon phases following a full moon.
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waning (moon)
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describes moon phases after a full moon.
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satellite
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any natural or artificial object that revolves around another object.
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axis
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imaginary line that planets spin on.
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space probe
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instrument that travels far into the solar system.
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space shuttle
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reusable spacecraft that can carry cargo and astronauts to space and back.
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Neptune
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the eighth planet from the sun
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full moon
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When the all of the moon's face is reflecting light.
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sphere
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A round 3-D object like a ball.
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comet
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space object made of dust and rock particles mixed with frozen water.
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ellipse
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elongated closed curve.
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