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10 Cards in this Set
- Front
- Back
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PLANET
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A celestial body moving in a elliptical orbit around star.
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TO REVOLVE
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Moves around central point.
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ORBIT
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The regularly repeated elliptical course of a celestial object or spacecraft about a star or planet.
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SUN
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Star around which a planetary system revolves.
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STARS
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A fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
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SPIRAL ARM
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Are regions of stars that extend from the center of spiral and barred spiral galaxies.
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GALAXY
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System of million or billions of stars together with gas, and dust, held together by gravitational attraction
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MILKY WAY
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The galaxy containing our solar system
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SPEED LIGHT
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The rate at which light or sound travel
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Earth
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The planet third in orders of distance from the sun between Venus and Mars.
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