60 year ago today, a small satellite ushered in the U.S. space program in a big way.
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.
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.
An upcoming study will take the old calibration standard of the Moon's brightness to a new level of precision.
The close pass of near-Earth asteroid 2012 TC4 this week will give NASA a chance to test planetary-defense coordination.
Arecibo and its team rode out the largest storm in its history, but it's unclear what the moderate damage will mean for the radio observatory's future.
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.
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.
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.
A new study proposes a possible source for the mysterious Mars Trojan asteroids: the Red Planet itself.
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.”
NASA's Juno Spacecraft delivers stunning closeup views of Jupiter's famous swirling Great Red Spot storm.
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.