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| | Weightlessness - Wikipedia, the free encyclopedia |
 | | Weightlessness for a more extended period of time occurs in a spaceship outside the earth's atmosphere, as long as no propulsion is applied, and that it is not rotating about its axis; orbiting the earth this is the case except when rockets are on for orbital maneuvers, and until atmospheric re-entry. |
 | | atmospheric reentry, landing on a parachute: gravity is opposed by atmospheric drag |
 | | The difference is that gravity acts directly on a person and other masses, just like on the vehicle, while forces like atmospheric drag and thrust first act on the vehicle, and through the vehicle on the person. |
| www.wikipedia.org /wiki/Microgravity (93 words) |
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