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| word | defenition |
|---|---|
| rotation | the spin of an object in space. |
| revolution | the elliptical motion of a body as it travels around another more massive body in space. |
| orbit | the elliptical PATH an object takes in space while revolving around another object |
| gravity | attracting force due to mass or rotation |
| atmosphere | mixture of gases that surrounds a planet |
| sun | a medium sized star; the center of our solar system |
| planet | body that orbit around the sun or a star and does not produce its own light |
| terrestrial planet | a small, dense, rocky planet similar to Earth (Inner planets) |
| gas giant | a large, gaseous planet of the outer solar system with no known solid surface |
| Natural satellite | smaller body that orbits around a larger body |
| moon | a natural satellite of a planet |
| artificial satellite | any human made object placed in orbit around a body in space |
| comet | a small body of ice, rock, and cosmic dust loosely packed together |
| asteroid | a small, rocky body that revolves around the sun |
| meteoroid | a very small, rocky body found in space |
| meteorite | a meteoroid that reaches Earth’s surface without burning up completely. |
| meteor | a bright streak of light caused when a meteoroid or comet dust burns up in the atmosphere. |
| thrust | the force that accelerates a rocket |
| orbital velocity | the speed and direction a rocket must have in order to completely breakaway from a planet’s gravitational pull. |
| escape velocity | the force that causes an object to follow a curved path. |
Created by:
kool_889567
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