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20 Cards in this Set
- Front
- Back
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Meteor
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A small body of matter from outer space that enters the earth's atmosphere.
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Meteorite
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A meteor that survives its passage through the earth's atmosphere.
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Maria
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A large, level basalt plain on the surface of the moon.
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Observatory
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A room or building housing an astronomical telescope or other scientific equipment.
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Revolution
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Motion in orbit or a circular course around an axis or center.
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Solstice
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When the sun reaches its highest or lowest point in the sky at noon.
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Equinox
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The time or date at which the sun crosses the celestial equator, when day and night are of equal length.
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Satellite
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An artificial body placed in orbit around the earth or another planet to collect information or for communication.
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Pluto
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The most remote known planet of the solar system.
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Space Probe
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An unmanned exploratory spacecraft designed to transmit information about its environment.
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Ellipse
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A regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points is constant.
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Sphere
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A round solid figure, or its surface, with every point on its surface equidistant from its center such as a planet like Earth.
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Rocket
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A cylindrical projectile that can be propelled to a great height or distance by the combustion of its contents, used typically as a firework or signal.
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Waning
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have a progressively smaller part of its visible surface illuminated, so that it appears to decrease in size.
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Asteroid
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A small rocky body orbiting the sun.
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Axis
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An imaginary line about which a body rotates.
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Solar System
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The collection of nine planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
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Solar Eclipses
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An eclipse in which the sun is obscured by the moon.
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Refracting Telescope
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A telescope that uses a converging lens to collect light.
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Space Shuttle
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A rocket-launched spacecraft, able to land like an unpowered aircraft, used to make repeated journeys between the earth and earth orbit.
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