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Space
Module H: Space
| Term | Definition |
|---|---|
| crescent | A curved, thin shape. When less than half the moon is illuminated. |
| gibbous | When the moon is more than half illuminated, but not yet fully illuminated. |
| waning | To decrease or decline in size. |
| waxing | To increase or grow in brightness. |
| phase | The change in the sunlit area of a celestial body as seen from another celestial body. |
| celestial body | A naturally occuring, physical object located in outer space, beyond Earth's atmosphere. |
| rotation | The circular movement of an object around a fixed axis. |
| revolution | The orbital motion of one celestial body around another. |
| orbit | The path that a body follows as it travels around another body in space. |
| eclipse | An event in which the shadow of one celestial body falls on another |
| umbra | A region of complete shadow result from total obstruction of light. |
| penumbra | A lighter, outer part of a shadow where only some light is blocked. |
| lunar | of or related to the moon. |
| solar | Of or related to the sun. |
| equinox | An occurrence where the position of the sun is exactly over the equator. (equal night) |
| solstice | An occurrence where the position of the sun is farthest north and south from the equator. |
| season | A division of the year that is characterized by recurring weather conditions, and determined by both Earth's tilt relative to the sun and Earth's position in its orbit around the sun. |
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