1. Space Exploration
... 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 ... 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 th...
- Word Count: 966
- Approx Pages: 4
- Has Bibliography
- Grade Level: High School