Explore Titan, Callisto and Europa

Take a tour of Europa, Callisto and Titan - three of the galaxy's most interesting moons.

By Jessika Toothman, HowStuffWorks.com

Callisto
With little erosion, no volcanoes and certainly no need for a local weatherman, Callisto is a pretty desolate place. But despite this, there are still some strange features on the surface that have scientists scratching their heads.

Titan
Titan is a very special moon, almost entirely unique among those in our solar system. Titan is the only nearby celestial satellite with a significant atmosphere. Although in some ways similar to the atmosphere here on Earth, there are also distinctive differences as well.

Europa
Europa is the smallest of the Jovian moons, discerned Italian astronomer Galileo Galilei through his telescope in 1610.

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