Space rocks big enough to destroy a city hit the Earth much more often than thought, according to an estimate by a private group devoted to preventing disaster from such orbital killers.
NASA is developing the capabilities needed to send humans to an asteroid by 2025 and Mars in the 2030s
Using NASA's Kepler Space Telescope, astronomers have discovered the first Earth-size planet orbiting a star in the "habitable zone"
Pivoting planets that lean one way and then change orientation within a short geological time period might be surprisingly habitable
Life took root more than four billion years ago on our nascent Earth, a wetter and harsher place than now, bathed in sizzling ultraviolet rays.
NASA released Thursday an image of a comet that, on Oct. 19, will pass within 84,000 miles of Mars -- less than half the distance between Earth and our moon.
Water has been detected in the atmosphere of a planet outside our solar system with a new technique that could help researchers to learn how many planets with water exist throughout the universe.
A collage of radar images of near-Earth asteroid 2006 DP14 was generated by NASA scientists using the 230-foot (70-meter) Deep Space Network antenna
New images from NASA's Curiosity Mars rover show Earth shining brighter than any star in the Martian night sky.
A team of scientists say they have solved a long-standing mystery of why UFO-lights sometimes appear just before an earthquake.
New research using data from NASA's Van Allen Probes mission helps resolve decades of scientific uncertainty over the origin of ultra-relativistic electrons in Earth's near space environment
The photo known as Earthrise is the first color photograph of Earth taken by a person in lunar orbit.
NASA and Planetary Resources Inc., of Bellevue, Wash., are partnering to develop crowd-sourced software solutions to enhance detection of near-Earth objects
A team of NASA and international scientists for the first time have gathered a detailed understanding of the effects on Earth from a small asteroid impact.
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