One of NASA's most senior and still-operational spacecraft reached a milestone: the rover Opportunity completed its first 25 miles traveling across the surface of Mars!
The data could yield a much more precise picture of how accumulating greenhouse gases will affect the planet.
How big can an Earth-like planet be? Astronomers thought they had a pretty good handle on this question but have just been given a fresh example of how nature never ceases to outpace our imaginations and show us something unexpected.
Two years ago, a solar coronal mass ejection of possibly the greatest recorded strength in history blasted by Earth's orbit. Had it impacted Earth's protective magnetic field, we could have experienced major disruptions in communication, brilliant aurora displays at tropical latitudes, damage to orbital satellites and possibly even major power blackouts.
Recently, NASA administrator Charles Bolden rephrased the "Moon, Mars and Beyond" mission plan to better align the steps toward Mars with budgetary realities and to balance human space programs with more cost-effective robotic missions.
Modern explorers have found a previously unknown ocean -- but this one's on Saturn's moon Enceladus. Learn more from Chabot Space & Science Center's Ben Burress at KQED Science.
SpaceX is launching a rocket to the International Space Station this afternoon. The live webcast begins at 12:45 PST and the launch itself is scheduled for 1:58.
Upholding a long-standing tradition of showing us things in space that we have never seen before, the Hubble Space Telescope recently witnessed the break-up of an asteroid.
Having solved a 42-year-old mystery about lunar "streamers," the $280 million LADEE spacecraft is set to vaporize when it collides with the moon around April 21st.
Getting sick in space is no picnic. So scientists are sending bugs to the International Space Station, hoping to better predict some of the physical challenges that may befall astronauts when NASA eventually sends the first human mission to Mars.
A recent study of data collected by NASA's Wide-Field Infrared Explorer (WISE) spacecraft may have exorcised the notion of the hypothetical existence of the fabled "Planet X."
Investigation of an ancient Martian meteorite has re-fueled a debate about evidence of possible past life on Mars.
NASA researchers announce they've verified 715 new planets orbiting around 305 stars.
Recent observations of the dwarf planet Ceres by the European Herschel Space Observatory have revealed for the first time the presence of water vapor on this object in the Main Asteroid Belt.
The NASA spacecraft is designed to answer a 42-year-old mystery about lunar dust, but it's also snapping photos along the way.
On Monday, far beyond the orbit of Mars, an alarm clock went off and a robot began the slow process of waking up after a long, cold sleep. The European Space Agency's Rosetta spacecraft is now approaching the comet 67P/Churyumov–Gerasimenko, which it will catch up with this May.
A tag-team of all-star research aircraft, including a robot, set out next week on a quest to explore a great atmospheric engine in the West Pacific with a powerful influence on global climate.
Let's take a moment to tally a few of 2013's highlights of astronomy and space exploration. In brief, it was a very good year on a number of fronts.