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Satellites
Beginning of essay
orbit the earth doing our bidding in ways that enrich the lives
of almost all of us. Through electronic eyes from hundreds of miles
overhead, they lead prospectors to mineral deposits invisble on earth's
surface. Relaying communications at the speed of light, they shrink the
planet until its most ....
Middle of essay
.... gravity feilds of the earth, moon, and sun tug at the orbiting
spacefarer. Even the sunshine's soft caress exerts a gentle nudge. Should
a satellite begin to wander, ground crews fire small fuel jets that steer
it back on course. This is done sparingly, for exhaustion of these gases
ends a craft's useful career. Under such stresses, many satellites last 2
years. When death is only a second away, controllers may command the
craft to jump into a high orbit, so it will move up away from earth,
k.... |
| Number of words: 482 |
Approximate pages: 2 |
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