Astronomers have devised an instrument that could lift the veil of doubt over whether we're alone in the universe.
A study based on 151 multi-planetary systems found by NASA's Kepler space telescope shows that most have a planet -- or two or three.
Saturn's icy moon Enceladus is showing definite signs of hydrothermal activity -- similar activity that is found along deep sea vents on Earth where water is heated and minerals are formed.
Hints that Jupiter's moon Ganymede, the largest moon in the solar system, has a subsurface ocean date back more than 40 years, but it took the Hubble Space Telescope and some clever scientific detective work by to come up with the proof.
Cute, squishy face, bug eyes, and a penchant for peanut M&Ms? Increasing amounts of research suggest the alien life we've been searching for won't look like anything Hollywood has yet imagined. And it might exist without compounds we deem essential.
NASA's Dawn mission is about to arrive in orbit around Ceres and the hunt for the dwarf planet's past (and possibly present) habitable potential is on.
For only the second time, an exoplanet living with an expansive family of four stars has been revealed.
Astronomers have found an ancient, more compact version of our solar system, which could have implications for the search of extraterrestrial life.
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