Alien Supercivilizations Absent from 100,000 Nearby Galaxies
The most far-seeing search ever performed for “Dyson spheres” and other artifacts of “astroengineering” comes up empty. Where is everybody?
Stories by Lee Billings
SpaceX Faces the Hard Truth about Soft Landings—They’re Tough to Do
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
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Martian Glaciers Equal Meter-Thick Planetary Ice Shell
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. ..
Supermassive Black Holes Make Merging Galaxies Green
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...
Jupiter, Destroyer of Worlds, May Have Paved the Way for Earth
Careening toward the sun, Jupiter cleared the way for Earth to form—with help from Saturn, too
Against April Fools' in Science Journalism
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...
NASA Chooses a Boulder as the Next Destination for Its Astronauts
The agency's controversial Asteroid Redirect Mission no longer calls for redirecting an asteroid into high lunar orbit
After a Martian Marathon, NASA's Opportunity Rover Faces Uncertain Future
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 [...]..
Fact or Fiction?: Dark Matter Killed the Dinosaurs
A new out-of-this-world theory links mass extinctions with exotic astrophysics and galactic architecture
That's What Ya Call a 4-Star Planet
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
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Looking for Life In Our Soggy Solar System
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 [...]..
First Active Hydrothermal System Found beyond Earth
Saturn's icy moon Enceladus has a surprisingly warm inner world
Dawn Spacecraft Arrives at Ceres, Becomes First to Orbit a Dwarf Planet
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...
Dawn Spacecraft Sees Spots as It Approaches Mysterious Ceres
Spectacular new images are trickling in from NASA’s mission to a dwarf planet in the Asteroid Belt
The Shifting Politics of NASA's Astronaut Program
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.
Bacteria Got an Early Fix on Nitrogen
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 Universe's Oldest Stars Were Late Bloomers
The Planck satellite reveals the universe's first stars formed more than a hundred million years later than previously believed
Space Science Budget Gets Small Lift
NASA has to deal with the unexpected financial consequences of robotic missions that just keep going. Lee Billings reports
NASA’s Next Space Telescope Promises the Stars—and Planets, Too
The much-hyped James Webb Space Telescope promises to revolutionize exoplanet science, but only if astronomers can agree on how to use it.
Planet Hunters Bet Big on a Small Telescope to See Alien Earths
In 1990, NASA's Voyager 1 spacecraft briefly looked back from its journey out of the solar system, capturing a view of the faraway Earth. Carl Sagan called it the "pale blue dot." From more than 6 billion kilometers away, beyond the orbit of Pluto, it seemed remarkable that our planet was even visible...
