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20 Cards in this Set
- Front
- Back
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solstice
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Twice yearly point at which the Sun reaches it's greatest distance North or South of the Equator.
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waxing(moon)
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Describes phases following a new moon, as more of the moon's lighted side becomes viable.
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solar eclipse
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Occurs when the Moon passes directly between the Sun and the Earth and cast a shadow over part of the Earth.
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lunar eclipse
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Occurs when the Earth's shadow falls on the Moon.
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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 the craters of the Moon's surface.
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radio telescope
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Collects and records radio waves traveling through space;can be used in the day or night under most weather conditions.
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Pluto
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Considered to be the ninth from the Sun;has a solid icy rock surface and a single Moon, Charon.
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orbit
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Curved path followed by satellite as it revolves around an object.
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rocket
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Special engine that can work in space and burns liquid or solid fuel.
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waning (moon)
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Describing phases that occur after a new moon, as the visible lighted side of the moon grows smaller.
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axis
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Imaginary vertical line that cuts through the center of the Earth and around which Earth spins
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full moon
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Phase that occurs when all of the Moon's surface facing Earth reflects light
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space shuttle
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Reusable spacecraft that can carry cargo,astronauts, and satellites to and from space.
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solar system
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system of nine planets, including Earth, and other objects that revolve around the Sun.
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satellite
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any natural or artificial object that revolves around another object.
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Earth
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Third planet from the Sun; has an atmosphere that protects life and surface temperature that allow water to exist as a solid, liquid and gas.
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Project Apollo
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Final stage in U.S. program to reach the moon in which Niel Armstrong was the first human to step on the Moon's surface.
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Project Gemini
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Second stage in the U.S. program to reach the moon in which an astronaut connected with another spacecraft in orbit.
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Project Mercury
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First step in the U.S. program to reach the moon that orbited a piloted spacecraft around earth and brought it back safely.
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meteorite
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a meteoroid that strikes the surface of the moon or planet.
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