Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Baumgartner will jump from a helium balloon in the stratosphere about 120,000 feet above Earth.
Discovery weakens theory that water may have existed on the Red Planet.
Video: Narrated by Leonardo DiCaprio, new film journeys to space to document the adventure to fix the world's most famous telescope.
NASA's Hubble Space Telescope has returned, and with it, our ability to peer into undiscovered worlds.
Astronauts circling the Earth have the wonderful vantage point of observing the nighttime Earth.
Images taken from the Hubble Space Telescope. See these amazing photographs on the Mother Nature Network.
Nobody has a better seat for hurricane season than NASA.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.