Jupiter moons

Thanks to a surface covered in liquid water, Jupiter's moon Europa serves as the prime suspect for bodies in our solar system harboring extraterrestrial life. For the most part though, speculation has assumed the life on Europa would be microscopic, similar to the chemical and rock-eating microbes found atop undersea volcanic vents on Earth. However, a new study estimates the level of oxygen in Europa's seas may be high enough to support fish-sized life. Hello, alien sushi.

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NASA has snapped a picture of Jupiter and its moons from a lunar observatory. The image shows what Jupiter looks like from an unusual space vantage point.

Version A of the Europa installment of our solar system poster series.

Space travel has intrigued Americans for more than a century. The imagery of human colonies on the Moon and Mars, giant space stations orbiting the Earth, exotic alien landscapes and species, and a myriad of other celestial visions have shaped our dreams and our actions as technology steadily advances. The planets in o

Version A of the Callisto installment of our solar system poster series. Callisto is a moon of Jupiter.