Astrobiology plays an important role in NASA's mission of scientific discovery.Artist rendering of a red dwarf or M star, with three exoplanets orbiting. About 75 percent of all stars in the sky are the cooler, smaller red dwarfs.Title screen from Life Underground, where students take the role of investigators of extreme subsurface environments looking for microbial life.Scalding hot water from an underground thermal spring creates an iron-rich environment similar to what existed on Earth 2.5 billion years ago (Left and Center). Filaments created by microbes as they deposit iron oxide at the bottom of small channel (Right
National Academy Call for White PapersAstrobiology Science Strategy for the Search for Life in the Universe01/04
Red Dwarf Stars and the Planets Around ThemAre red dwarf stars really a good place to look for habitable planets?02/04
Exploring the Stars Through Video and Board GamesSpace games can reel in younger audiences, and even add to serious research.03/04
2.5 Billion Years of Earth History in 100 Square FeetStudying Earth's history on a tiny Japanese island.04/04
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Mars rover taking a picture of itself.
NASA MISSIONSExploring the Red Planet

The rovers and spacecraft we’ve sent to Mars have found evidence the planet was warmer in the past, with lakes and rivers. Was there life there? Future exploration may find evidence for that as well.

The facts and figures —37%

The gravity on Mars is only 37 percent of Earth’s gravity. Not only could you leap three times higher on Mars, but this lower gravity is one reason why Olympus Mons became the biggest volcano in the solar system.

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