Former NASA astronaut Mike Massimino, veteran of two space shuttle missions to Hubble, recalls how he saved the telescope he loves
Mariette DiChristina, Scientific American's Editor in Chief, has a special place in her heart for the Hubble Space Telescope
The most far-seeing search ever performed for “Dyson spheres” and other artifacts of “astroengineering” comes up empty. Where is everybody?
With two partially successful landing attempts of its Falcon 9 booster, the private company inches closer to its goal of making a fully reusable rocket
Radar measurements and models of Earthly glacial ice flows led researchers to conclude that the glaciers spotted on Mars from orbiters contain nearly 150 billion cubic meters of water. ..
Green as a color can mean animal, vegetable or mineral. It is the stuff of crocodiles, chlorophyll and copper patina, the essence of serpentine or of snakes in the grass, the hue of a glacial lake, a stagnant pond and the Chicago River on St...
Careening toward the sun, Jupiter cleared the way for Earth to form—with help from Saturn, too
My lowest point as a science journalist came before I even knew what a science journalist was. I was a young punk in an eighth-grade science class at Northwood Middle School in Greenville, South Carolina...
The agency's controversial Asteroid Redirect Mission no longer calls for redirecting an asteroid into high lunar orbit
It's been a long time coming, but this week NASA's Mars Opportunity rover completed the first-ever Martian marathon. After landing on the Red Planet in January 2004 on a mission originally planned to only last 90 days, Opportunity has instead endured for more than a decade, and has taken eleven years and two months to [...]..
A new out-of-this-world theory links mass extinctions with exotic astrophysics and galactic architecture
Astronomers report the discovery of only the second quadruple-star system known to host at least one planet. But they suspect there are a lot more such systems out there. Lee Billings reports
Scientists are finding liquid water, the cornerstone for life as we know it, in surprising nooks and crannies of the solar system. Following Wednesday's news that there seem to be hydrothermal vents churning away in the warm, alkaline seas inside Saturn's moon Enceladus, researchers announced airtight evidence yesterday that Jupiter's moon Ganymede also has a [...]..
Saturn's icy moon Enceladus has a surprisingly warm inner world
Shortly after 7:30 am Eastern time this morning, a seven-year space voyage at last reached its final destination: NASA's Dawn mission entered orbit around Ceres, a small, icy world orbiting the sun between Mars and Jupiter...
Spectacular new images are trickling in from NASA’s mission to a dwarf planet in the Asteroid Belt
Ever since President George W. Bush's decision to retire the space shuttles in the aftermath 2003's Columbia disaster, NASA's human spaceflight program has been adrift.
New evidence points to the evolution of the ability for bacteria to grab nitrogen from the atmosphere some 3.2 billion years ago, about 1.2 billion years earlier than thought—with implications for finding extraterrestrial life...
The Planck satellite reveals the universe's first stars formed more than a hundred million years later than previously believed
NASA has to deal with the unexpected financial consequences of robotic missions that just keep going. Lee Billings reports