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20 Cards in this Set
- Front
- Back
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Sphere
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A round, solid figure.
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Axis
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An imaginary line in which the Earth rotates on.
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Rotation
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The action of rotating around an axis or center.
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Full Moon
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The phase of the moon being total or full.
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Solstice
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Either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon.
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Earth
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The planet in which we live on.
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Pluto
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The most known planet of the solar system, usually ninth in order from the sun.
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Orbit
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The curved path of a spacecraft around a star, planet, or moon.
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Asteroid
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A small rocky body orbiting the sun.
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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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Comet
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A "ball" consisting of dust and gas from outer space.
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Equinox
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The time or date which happens twice a year when the sun crosses the equator.
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Satellite
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An artificial body placed in orbit around the earth, moon, or another planet in order to collect information or for communication.
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Solar System
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The collection of nine planets and their moons that orbit around the sun.
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Radio Telescope
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An instrument used to detect radio emissions from the sky.
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Project Mercury
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Project Mercury was the first spacecraft to be made in the U.S.A.
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Rocket
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A type of spacecraft that sends humans into space, propelled by a missile or spacecraft.
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New Moon
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The phase of the moon when it is in contact with the sun and invisible from Earth.
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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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Revolution
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An instance of revolving.
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