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Sun earth moon
| Term | Definition |
|---|---|
| Satellite | Is a body that orbits a planet. |
| Star | A giant ball of superheated gas, or plasma, composed of hydrogen and helium |
| Meteor | A streak of light produced when a small piece of rock or ice enters earth’s atmosphere and burns up |
| Comet | A cold mixture of dust and ice that develops a long trail of light as it approaches the sun |
| Constellation | A pattern or group of stars that people imagine represents a figure, animal or object |
| Geocentric | An earth centered model |
| Heliocentric | Sun centered model |
| Astronomy | The study of space |
| Ellipse | The oval shape of planets orbits |
| Sun | largest object in our solar system |
| Planet | Spherical, orbits the Sun, has a larger mass than the objects around |
| Axis | An imaginary line that passes from the North Pole, to the South Pole |
| Rotation | The spinning of earth on its axis |
| Revolution | The movement of one object around another |
| Orbit | Path that planets follow when they orbit the sun |
| Solstice | Earth Is directly titled toward or away from the sun which causes the longest or shortest daylight in a year |
| Equinox | Earth is not titled toward the sun which causes equal day and night |
| Gravity | Force that attracts all objects toward each other |
| Law of universal | Every object attracts every other and force depends on mass and distance |
| Inertia | The tendency of an object to resist a change in motion |
| Phase | Different shape of the moon you see |
| Solar eclipse | When the moon passes directly between the earth and the sun during a new moon |
| Lunar moon | Occurs during a full moon she earth is directly between the moon and the sun |
| Umbra | Darkest pet of a shadow where light is completely blocked |
| Penumbra | Area of a shadow where light is partially blocked |
| Tide | Daily rise and fall of ocean water |
| Spring tide | Higher high tides during full and new moon |
| Neap tide | Lower high tides during the first and third quarter moons |
| Maria | Dark smooth, lava covered areas on the moon |
| Highlands | Higher lighter areas on the moon covered with craters |