Could Tiny Fusion Rockets Revolutionize Spaceflight?
A small NASA-funded company is slimming down nuclear fusion reactors for space science
Stories by SPACE.com
What's Next for NASA's New Astronaut Class?
A dozen new candidates were chosen from more than 18,000 applicants. Now the real work begins
For First Time, Einstein's Relativity Used to Weigh a Star
Scientists employ ‘gravitational lensing’ to measure the mass of a white dwarf
Celestial Harmonies Pin Down Orbit of Exoplanet TRAPPIST-1 h
Orbital resonances reveal the Earth-size world circles its star every 19 days
Rare Supernovae May Solve 40-Year-Old Antimatter Mystery
Most of the Milky Way’s antimatter may come from the explosive collisions of white dwarf stars
NASA Calls for Europa Mission Instrument Ideas
Researchers should begin planning instruments to go on a potential life-hunting lander mission to Jupiter's ocean-harboring moon Europa, the space agency said
"Snow White" the Dwarf Planet Has Its Own Moon
Astronomers have found a moon orbiting the third-largest dwarf planet in our solar system
Kickstarter Project Seeks to Resurrect Pioneer Plaques
The crowdsourced effort intends to build replicas of the famed "galactic greeting cards," which are traveling out of the solar system on the Pioneer 10 and 11 space probes
Astronomers Find Water and Weird Clouds on Extrasolar "Warm Neptune"
Two space telescopes reveal the distant exoplanet HAT-P-26b has an atmosphere rich with hydrogen, helium and water vapor
Could "Planetary Protection" Scuttle Otherworldly Exploration?
Scientists are grappling with the problem of biological cross-contamination between Earth and other worlds
Scientists Push to Orbit Pluto
After New Horizons’ 2015 encounter with the dwarf planet, researchers are hoping to go back—to stay
World's Biggest Space Telescope Heads West on Path to Launchpad
With its testing at Goddard Space Flight Center completed, NASA’s James Webb Space Telescope embarks for further testing in Texas before its 2018 launch
NASA's Next Big Observatory to Go under the Microscope
An independent review panel will scrutinize the space agency’s in-progress Wide-Field Infrared Survey Telescope to ensure the project is on track
Earth-Mass "Ice Ball" Planet Found 13,000 Light-Years Away
The chilly, distant world is the smallest yet found via the “microlensing” planet-hunting technique
Cassini Survives Closest-Ever Encounter with Saturn, Snaps Stunning Images
First images from an epic dive through Saturn’s rings reveal a giant hurricane and turbulent storm clouds
"Dragonfly'" Drone Could Fly across Saturn's Moon Titan
The quadcopter-style lander could explore some of the moon’s most promising sites for habitability and life
NASA's Cassini Mission Conducts Daring Dive through Saturn's Rings
The maneuver marks the final phase of Cassini’s mission, and promises the closest-ever investigation of Saturn
Meet "Steve," a Strange New Sky Phenomenon
Citizen scientists and space-agency satellites come together to discover a new variety of aurora
NASA Funds 22 Futuristic Ideas for Space Exploration
The research grants provide funding for new studies of spacecraft propulsion, synthetic biology and more
Big, Shiny Asteroid to Buzz Past Earth on April 19
Approach of the 2,000-foot space rock is closest for such a large object since 2004
