Although a Copernican system was much simpler than the Aristotelian, it still had its own problems. ... However, instead of revising the circles, they decided to add more, and tried to create a system that worked completely based on circles. ... He proposed, that instead of many systems of circles, the planets moved in an elliptical fashion. ... This allowed for many of the complications caused by the circular system to go away, and involved a much simpler system, which matched relatively well with actual observations. ... With his theory of Gravity, the equations that governed it, and one of ...

• Word Count: 3486
• Approx Pages: 14
• Has Bibliography

Lets say that it's not common and there is only one in a million planet in each system. ... But for more scientific approach we can consider Drake's equation. ... But with recent discovery of other planetary systems, the odds have shifted in favor of life. ... And even more important, this will give us the freedom of solar system. ... If we are introduced with abundant energy, we will have the freedom to travel in the solar system. ...

• Word Count: 2961
• Approx Pages: 12

Have you ever wondered if we are truly alone in the Universe? The discovery of other intelligent life in the Universe would be the most important event in human history. For several hundreds of years, people have observed strange objects in the night sky, some of which are nothing more than...

• Word Count: 2957
• Approx Pages: 12
• Has Bibliography
• Grade Level: High School