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This is a free sample preview of the essay
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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