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Sun earth moon
| Term | Definition |
|---|---|
| Satellite | A body that orbits a planet |
| Star | A giant ball of superheated gas,or plasma,composed of hydrogen and helium |
| Planet | An object that orbits the sun |
| Meteor | A streak of light produced when s small piece of rock or ice , known as a meteoroid, burns up as it enters earths atmosphere |
| Comet | A cold mixture of dust and ice that develops a long trail of light as it approaches the sun |
| Constellation | A pattern or groups of stars that people imagine represents a figure, animal, or object |
| Geocentric | Earth-centered model |
| Heliocentric | Sun centered |
| Ellipse | An oval shape, rather than a perfect circle. |
| Axis | An imaginary line that passes from the North Pole, through the earth’s, to the South Pole. |
| Rotation | The spinning of earth on its axis |
| Revolution | The movement of one object around another |
| Orbit | Earths path |
| Solstice | When the sun appears highest in the sky |
| Equinox | Neither hemisphere is tilted toward the sun |
| Gravity | Force that attracts all objects toward each other |
| Law of universal | Every object in he universe attracts every other object |
| Inertia | The tendency of an object to resist a change in motion |
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