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As many as one in five Sun-like stars may have a planet the size of Earth, and the nearest could be in systems visible to the naked eye, US astronomers said Monday. The research is based on a new analysis of findings from NASA’s Kepler space observatory...

How the life originated and evolved? Is there life elsewhere in the universe? What is the future of life on Earth and on other planets? These three fundamental issues define well area of interest of a new young interdisciplinary science called astrobiology...

Watch Video(CNN) — In a discovery that has been years in the making, researchers have confirmed the existence of a rocky planet named Proxima b orbiting Proxima Centauri, the closest star to our sun, according to a new study. It is the closest exoplanet...

It’s hard to imagine a less-hospitable location in the solar system than the surface of Venus. Humans can’t survive without spacesuits and life support systems anywhere besides Earth, but Mars, the Moon, and Europa present challenges we could probably...

NASA’s Spitzer Space Telescope has revealed the first known system of seven Earth-size planets around a single star. Three of these planets are firmly located in the habitable zone, the area around the parent star where a rocky planet is most likely...