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earth, moon, sun
| Term | Definition |
|---|---|
| Astronomy | the study of the moon, stars, and other objects in space |
| Axis | the imaginary line that passes through Earth’s center and the North and South poles |
| Rotation | the spinning of Earth on its axis |
| Revolution | the movement of one object around another |
| Orbit | a path, revolves around the sun |
| Solstice | when the sun is farthest north or south of the equator |
| Equinox | the two days of the year on which neither hemisphere is tilted or away from the sun |
| Gravity | The force that pulls objects toward each other |
| law of universal gravitation | the scientific law that states every object in the universe attracts every other object |
| Mass | a measure of how much matter is in an object |
| Weight | a measure of the force of gravity on an object |
| Inertia | the tendency of an object to resist any change in its motion |
| Newton’s First Law of Motion | The scientific law that states than an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force. |
| Phase- | one of the different apparent shapes of the moon as seen from earth |
| Eclipse- | the partial or total blocking of one object in space by another. |
| Solar eclipse | the blocking of sunlight to earth that occurs when the moon is directly between the sun and the earth |
| Umbra | -the darkest part of the shadow |
| Penumbra | -the part of the shadow surrounding the darkest part |
| Lunar eclipse | the blocking of sunlight to the moon which occurs when earth is directly between the sun and the moon |
Created by:
helen lawendy
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