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Exploring Mars
Vocabulary from Exploring Mars
| Term | Definition |
|---|---|
| ancient | very old, from a time long ago |
| atmosphere | a mass of air surrounding a planet |
| crater | a dent formed when something hits the ground hard |
| create | to make |
| encourage | to give help or hope to |
| gravity | the force that pulls objects toward the center of a planet or a star |
| orbit | the path taken by an object around a star or planet |
| reality | a real event, the state of being real |
| solar system | a sun and all the planets that orbit it |
| space probe | a spacecraft that explores the solar system |