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The Moon
Term | Definition |
---|---|
Phase | One of the different shapes of the moon as seen from earth. |
Eclipse | The partial or total blocking of one object by another. |
Solar eclipse | The blocking of sunlight to earth that occurs when the moon is between the sun and earth. |
Umbra | The darkest part of the shadow. |
Penumbra | The part of a shadow surrounding the darkest part. |
Lunar eclipse | The blocking of sunlight to the moon that occurs when earth is directly between the sun and the moon. |
Tide | The rise and fall of the level of water in the ocean. |
Gravity | The attractive force between two objects; its magnitude depends on their masses and the distance between them. |
Spring tide | A tide with the greatest distance between low and high tides. |
Neap tide | A tide with the least difference between low and high tides. |
Telescope | A device built to study objects by making them appear closer. |
Crater | A round pit on the moon's surface. |
Maria | Dark, flat regions on the moon's surface; thought to be a sea of water on the moon. |