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stars and planets
vocabulary
| Term | Definition |
|---|---|
| rotate | To spin around an axis. |
| axis | An imaginary line that runs through the center of the earth from the North pole to the South pole. |
| revolve | To travel in a closed path around the sun. |
| orbit | An object's path in space around another object. |
| moon | A small planet-like body that revolves around earth than the sun. |
| phases | As the moon revolves around earth, different amounts of its lit surface can be seen |
| solar system | is a group of objects in space that orbit a star in the center, plus the star itself. |
| planet | Is a large object that revolves around a star in a clear orbit. |
| dwarf planet | Also revolves around a star, but its path is not clear of other objects. |
| comet | A ball of rock, ice and frozen gases. |
| star | A huge ball of superheated gases. |
| sun | A star that is in the center of our solar system. |
| constellation | A group of stars that form an imaginary picture in the sky. |
| galaxy | A huge system of gases, dust, and stars. |
| universe | Everything that exists in space. |