Dust and gas between stars would pose a threat to spacecraft en route from Earth to the Alpha Centauri system — and scientists are seriously considering the problem now that the prospect of interstellar travel is no longer sci-fi.
The discovery of trans-Neptunian object 2011 KT19 in a strange orbit deepens a key mystery in the outer solar system.
Careful tracking of NASA's Dawn spacecraft reveals that Ceres has a rocky core and a thick ice-and-salt crust. Maybe a briny ocean still lies buried inside.
JAXA and NASA are looking at the possibility of replacing the dead Hitomi X-ray observatory, with a potential launch around 2020.
The Mars 2020 rover reached a third crucial milestone this past week on the path to the launch pad.
After a 5-year-long journey, NASA's latest emissary to the largest planet in the solar system has arrived at its destination.
First science results from ESA's LISA Pathfinder mission exceed expectations, with five times the sensitivity. This result paves the way for a future full-scale gravitational wave observatory in space.
Planetary scientists are counting on amateur observations to enhance the results from NASA's forthcoming Juno mission.
The orbiting science laboratory begins a series of marathon passes this week that favor the northern hemisphere.
The European Space Agency is opting to send its first rover to the Red Planet two years later than originally planned.
Russia's Mikhailo Lomonosov observatory takes to the skies on the hunt for gamma-ray bursts, cosmic rays, and near-Earth asteroids.
The Japanese space agency JAXA has released a timeline covering the Hitomi space observatory's failure last month. Salvage efforts continue but recovery appears unlikely.
The Kepler team unexpectedly found the planet-hunting spacecraft in emergency mode on April 7th, but with the spacecraft recovered, hopes are high that its newest search, this time for rogue planets, is still on. Read on to see how amateur observations can help!
Yuri Milner commits $100 million to Breakthrough Starshot, a research and development project toward sending interstellar nanoprobes to Alpha Centauri.
Ground controllers are scrambling to recover the Hitomi satellite from a mysterious 'debris anomaly' over the past weekend.
Observations by NASA's New Horizons spacecraft, combined with new modeling of long-term trends, suggest that Pluto's atmosphere is far more dynamic than anyone imagined.
By tracking deviations in spacecraft orbits, planetary scientists have created a high-resolution map of the Red Planet's gravitational pull.
The launch of ESA's ExoMars Trace Gas Orbiter and Schiaparelli lander heralds a new phase of Mars exploration.
An innovative CubeSat mission, slated to take to space this year, will demonstrate the feasibility of free-flying satellites.
Among its other geologic oddities, Pluto has clusters of hills floating in a frozen "sea" dominated by nitrogen ice. These bobbing bumps might hold clues to the plain's depth and evolution.
The Lunar Reconnaissance Orbiter has finally spotted the impact of the Apollo 16 booster, more than 43 years after it happened.
The U.S. Postal Service has unveiled new stamps, to be issued later this year, that feature 10 solar-system objects — including Pluto.
An innovative and tiny thruster design could prove the future of interplanetary exploration with the tiny satellites known as CubeSats.
Are enigmatic gullies seen on many steep Martian slopes caused by liquid water or instead by episodic coatings of frozen carbon dioxide?
A mechanical problem in the spacecraft's seismometer can't be fixed before the planned launch date, so NASA managers have postponed the mission until 2018.