Quiz 31


Question 1 of 4

We've gotten pretty good at building craft that can blast into space. But while these rocket engines are great at breaking free of Earth's gravity, they consume a lot of fuel. Researchers have developed another kind of engine that, once in space, can slowly accelerate to high speeds and continue to propel the ship for years. What kind of engine is it?


Ion engine: NASA
Asteroid image: NASA/JPL-Caltech
Heat shield image: NASA Langley/Kathy Barnstorff

Web Site:
Lauren Aguirre, Director of Digital Media
Jennifer Doherty, Associate Producer
Allison Eck, Production Assistant
Daniel Hart, Senior Developer
Tyler Howe, Senior Designer
Jacqueline Mason, Intern
Kathleen Masterson, Content Producer
Sony Salzman, Intern
Mitch Smith, Developer
Mike Steadman, Systems Manager
Jesse Weisbeck, Developer