Space Rockets

 Rockets

A rocket moves forward when gases expelled from the rear of the rocket push it in the opposite direction. Hot gases are propelled out of the back of a rocket engine. The force of the gas in one direction (action) produces an opposing force (reaction) that propels the rocket forward.

  

Inside Orientation of a Rocket

  

Stages Of a Rocket

  1. Heavy first stage provides thrust for launch.

   2. First stage separates and falls to earth.

   3. Second stage ignites and continues with third stage.

   4. Second stage separates and falls to earth.

   5. Third Stage ignites.

   6. Third stage is discarded.

   7. Lunar vehicle proceeds to lunar orbit.

A Mars rover is an automated motor vehicle which propels itself across the surface of the planet Mars after landing.
Rovers have several advantages over stationary landers: they examine more territory, they can be directed to interesting features, they can place themselves in sunny positions to weather winter months and they can advance the knowledge of how to perform very remote robotic vehicle control

for more information

http://marsrover.nasa.gov/