Copyright © Astronomy Roadshow All rights Reserved

To get into orbit, you do need an engine. This is a test firing of the latest rocket engine at the Stennis Space Center near New Orleans. A free place to visit. Witnessing a test firing is even more thrilling to some than a launch as the experience lasts much longer. The 'smoke' isn't smoke - it's steam from the water pouring on the test pad to keep it from cracking under the intense heat and to reduce sound levels that may also cause damage. Click on the play button then the square button on the bottom right for full screen and turn the sound up...

  The Future in Space