Quiz 31

1

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?

  Credits

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

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