I. As Konstantin Tsiolkovsky said, "Earth is man's cradle, and man eventually has to leave the cradle."

A. For a very long time man has gazed at the sky and wondered; What is out there? How can we find out

1. Now we can and have found out what is truly out there with space travel and space colonization.

II. Getting into space would be almost impossible without the theories of these three men.

A. Johannes Kepler

1. German Mathematician

2. Figured out equation for orbiting planets and satellites.

B. Isaac Newton

1. Wrote and established the basic laws of force, motion, and gravity.

2. Developed math system calculus.

C. Konstantin Tsiolkovsky

1. In 1903 figured out the basic equations for rockets.

2. Predicted that rocket fuel would be a liquid.

a. Most likely oxygen or hydrogen.

III. They figured out the equations and math needed to launch and fly rockets, there are many other important...