The Kilopower fission reactor will offer a more efficient and more powerful portable power source for solar system exploration.
The next year will see space missions headed for Mars, Mercury, the Sun, and more. Asteroid rendezvous, exoplanet discoveries, and a Mars landing await.
NASA has selected two finalists for consideration as the next New Frontiers mission: a comet sample return and a flying drone for Titan.
NASA engineers directed the historic spacecraft Voyager 1 to fire its backup thrusters for the first time in 37 years.
NASA is developing a key instrument for a mission to the Martian moons, Phobos and Deimos.
A suborbital launch from Wallops Flight Facility tested a critical piece of landing hardware for the Mars 2020 rover.
Early next year, an international team will track the uncontrolled atmospheric reentry of Tiangong 1, China's first prototype space station.
Observations from NASA's MAVEN spacecraft reveal that the solar wind causes unexpected interactions with the Red Planet's weak magnetism.
Engineers are looking for a way to continue using Curiosity's drill after a 10-month hiatus, but restoring the drill will probably take several more months.
You'd think scientists would have Saturn all figured out after watching it up close for 13 years. They don't.
The long-awaited James Webb Space Telescope — the successor to the Hubble Space Telescope — has slipped its launch date by several months. It will now launch between March and June 2019.
The asteroid-bound Osiris-REX mission took time during last Friday's gravity assist maneuver to look back at its homeworld.
NASA's ambitious Osiris-REX asteroid sample return mission swings by Earth this Friday for a gravity assist en route to asteroid 101955 Bennu.
After 13 years of orbiting the Saturn system, and 4.9 billion miles logged, the Cassini mission has ended, vaporized on re-entry into the ringed planet.
Scientists and astronomy enthusiasts are coming together to celebrate two spacecraft, billions of miles beyond Earth, as they head for the stars.
Engineers have come up with an innovative "clockwork rover" concept designed to survive the hostile environment of Venus.
Satellites, aircraft, and the International Space Station provided great views of yesterday's solar eclipse, near and far.
A challenging and intensive campaign by telescope-toting teams yields big-time results on the body that the New Horizons spacecraft will fly past in 17 months.
While millions will watch the August 21 total solar eclipse from the ground, International Space Station crew will have an amazing view high from overhead.
Saturn keeps its secrets as NASA's Cassini spacecraft heads towards its September grand finale.
Six Sprites, "the world's smallest spacecraft" have entered low-Earth orbit, a small milestone for Breakthrough Starshot's plan for interstellar voyage.
The European Space Agency switched off its groundbreaking LISA Pathfinder mission this week.
Russia's first crowd-funded satellite, named Mayak (Russian for "beacon of light"), promises to be the “brightest object in the night sky next to the Moon.”
Researchers are figuring out how to use a nature-inspired "gecko gripper" technology to solve the mounting problem of space debris.
A recent NASA study outlines possible dedicated missions to the "ice giant" planets Uranus and Neptune that might leave Earth as early as 2030.