Have you ever wondered if sometime in the near future, if human beings will be able to colonize other planets? For centuries, people have dreamed of leaving the Earth and traveling through space to visit other planets and stars. During the past thirty years, some of these dreams have become a reality. Spacecrafts have orbited the Earth and sent back information that has helped to broaden our knowledge of the solar system. “That’s one small step for a man, one giant leap for man kind” as, stated by Neil Armstrong in The New Book of Knowledge, pg 340h.
To begin with, before man could have gone to space, scientists had to figure out a way to leave the Earth. Scientists figured a spacecraft leaving Earth would have to travel fast enough to overcome Earth’s strong gravitational pull. The speed needed to overcome Earth’s gravity is 25,000 mph, which is about 7 miles per second. Even at this speed, that does not mean that a spacecraft has completely freed itself from the Earth’s gravity, which extends far out into space. As the spacecraft continues to move away from the Earth the gravitational force weakens until it no longer has a significant effect on the spacecraft. Next, for a spacec
Example Essays Home
