As major league baseball readies for the World Series, NASA's Cassini team will come to bat twice this month when the spacecraft flies by Saturn's geyser moon, Enceladus.
An asteroid measuring several feet in diameter is expected to enter the atmosphere over northern Sudan before dawn Tuesday, setting off a potentially brilliant natural fireworks display.
Scientists using NASA’s RHESSI spacecraft have measured the roundness of the sun with unprecedented precision and found that it is not a perfect sphere.
Astronomers who count sunspots have announced that 2008 is now the "blankest year" of the Space Age.
NASA's Phoenix Mars Lander has detected snow falling from Martian clouds. Spacecraft soil experiments also have provided evidence of past interaction between minerals and liquid water, processes that occur on Earth.
Scientists find that dim areas at the edges of active sunpot regions may hold the key to the sun's energy processes.
One of the nearest supernovas in the last 25 years has been identified over a decade after it exploded.
NASA's Mars Reconnaissance Orbiter has revealed hundreds of small fractures exposed on the Martian surface that billions of years ago directed flows of water through underground Martian sandstone.
Data from the Ulysses spacecraft, a joint NASA-European Space Agency mission, show the sun has reduced its output of solar wind to the lowest levels since accurate readings became available.
NASA's Mars Rover Opportunity is setting its sights on a crater more than 20 times larger than its home for the past two years.