
Millions of Small Asteroids That Could Threaten Our World Remain Uncatalogued
NASA’s best hope for planetary defense resides with a proposed asteroid-seeking space telescope. Will it get funded?
Lee Billings is a science journalist specializing in astronomy, physics, planetary science, and spaceflight and is senior desk editor for physical science at Scientific American. He is author of a critically acclaimed book, Five Billion Years of Solitude: The Search for Life Among the Stars, which in 2014 won a Science Communication Award from the American Institute of Physics. In addition to his work for Scientific American, Billings’s writing has appeared in the New York Times, the Wall Street Journal, the Boston Globe, Wired, New Scientist, Popular Science and many other publications. Billings joined Scientific American in 2014 and previously worked as a staff editor at SEED magazine. He holds a B.A. in journalism from the University of Minnesota.

Millions of Small Asteroids That Could Threaten Our World Remain Uncatalogued
NASA’s best hope for planetary defense resides with a proposed asteroid-seeking space telescope. Will it get funded?

How to Map an Exoplanet's Rings
Dips in starlight reveal the architecture of a super Saturn around a distant star

Richard Garriott's Cabinet of the Universe, Part 1: The Big Bang
Richard Garriott, video game developer and space entrepreneur, explains how he and his wife collected enough artifacts to illustrate the entire history of the universe. In this video he takes us back to the very beginning. Next Week: Earth Forms

SpaceX's Triumphant Rocket Landing Could Revolutionize Spaceflight
Once considered the stuff of science fiction, fully reusable rocketry is now closer to reality than ever before

Astronomers Rename Famous Exoplanets
More than 30 worlds have new names drawn from world mythology, literature and history

Astronomers Skeptical Over "Planet X" Claims
Two controversial new studies suggest the discovery of large objects at the outer reaches of the solar system

Ceres Is Cloudy, with a Chance of Cryovolcanoes
New findings reveal a crater’s vaporous hazes, and hint at the dwarf planet’s possible origin in the outer solar system

Fast Radio Bursts Mystify Experts—for Now
Astronomers are closing in on the origins of baffling radio flashes from deep space

Collecting Meteorites in Your Own Backyard
All it takes is a magnet and knowing where to look.

Astronomers May Have Witnessed 2 Black Hole Births
Stars that disappear rather than explode could signal a black hole’s beginnings

Human Missions to Mars Will Look Completely Different from The Martian
The blockbuster film’s futuristic vision of interplanetary exploration could soon be out of date

Are We on the Cusp of War—in Space?
China, Russia and the U.S. are developing and testing controversial new capabilities to wage war in Earth orbit

Searching for Life in Martian Water Will Be Very, Very Tricky
The risk of microbial contamination could prevent humans and even robots from visiting the most promising parts of the Red Planet

Cassini Confirms a Global Ocean on Saturn's Moon Enceladus

NASA Struggles over Deep-Space Plutonium Power
Sluggish production of nuclear fuel could make solar power the preferred choice for the agency’s outer-planets missions

QUIZ: How Well Do You Know Einstein?

To Play or Not to Play the Exoplanet Name Game?
Campaigns to name exoplanets seem like Shakespearean farce

War in Space May Be Closer Than Ever
China, Russia and the U.S. are developing and testing controversial new capabilities to wage war in space despite their denial of such work

Inside the Race to Glimpse Alien Jupiters
Two rival teams of astronomers are racing to capture unprecedented images of giant planets around other stars. What they find could change the future of planet hunting

Europa's "Brown Gunk" Suggests a Briny Sea
The mysterious gunk on Jupiter’s moon may be sea salt

Search for Alien Life Ignites Battle over Giant Telescope
Private funding for the Arecibo Observatory—the largest single-dish radio telescope in the world—may be a poison pill

Kepler Mission Discovers a Near-Twin of Earth Orbiting Sunlike Star
The planet, Kepler 452 b, is likely rocky and orbits in its star’s habitable zone where liquid water can exist

Search for Extraterrestrial Intelligence Nets Historic Cash Infusion
With a $100-million donation, billionaire Yuri Milner plans to revolutionize the astronomical quest to find alien life

Stephen Hawking and Yuri Milner Announce $100M Initiative to Seek ET
Milner, a tech start-up entrepreneur and philanthropist, is partnering with scientists around the world to search for life among the stars