The awesome story of humanity's destiny in space is not complete without further scientific explanations.  Here are some informative and easy-to-understand explanations about the science of Astronomy and Spaceflight.  

Astronomy

• Newton's Laws of Motion

• The Law of Universal Gravitation

• Concepts of Planetary Motion

Spaceflight

• The Different Types of Rocket Engines

• Attitude Control

• The Effects of Weightlessness on the Human Body

• How Astronauts Survive Reentry