Outer Space

Of All Jupiter's Moons, Why Is Life More Likely On Europa?

NASA scientists have directly imaged what they think are plumes of water vapor emanating from the surface of Jupiter's moon Europa. This would mean liquid water—one more piece of evidence pointing to the possibility of life there. But we suspect that many of Jupiter's moons contain liquid water, so why all the excitement over Europa? The answer: salt. Explore this idea in the video below.

Why Is Life Likely On Europa?

There's a reason so many Earth species live in saltwater.

What's So Special About Europa?

An astronomer explains what he finds fascinating about the moon.

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Hubble Directly Images Plumes Of Water Vapor On Europa

We've seen hints, but this is the first time we've directly imaged what are probably plumes of water vapor on the moon.

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