The Amazon founder announced plans to fly a fleet of reusable spacecraft from the Cape Canaveral spaceport
This week brings a video reconstructed from images of the Philae lander's approach to a comet, and a major new analysis of data from the Cassini mission that bolsters the case for a global, not just local, ocean beneath the icy crust of Enceladus...
A galactic satellite reveals where some of our galaxy's elusive material is hiding
Comet 67P/Churyumov-Gerasimenko’s incongruous chemical composition and shape raise questions about the origin of our solar system
Sluggish production of nuclear fuel could make solar power the preferred choice for the agency’s outer-planets missions
A new lightweight material that heals itself when punctured could help spacecraft survive run-ins with debris. Christopher Intagliata reports
NASA's New Horizons team decide on their next target, a classical Kuiper Belt object that can be reached by January 2019, but the agency must still approve funds for this extended science mission...
A Harvard professor devises a scheme to detect extraterrestrials by tracking how they might commute from one world to the next
NASA's Curiosity rover provides a beautiful, scientifically appetizing view of what's ahead on Mount Sharp on Mars
The spacecraft makes one last close flyby of Saturn's pockmarked moon Dione August 17, in search of direct evidence that the moon is geologically alive and active
Campaigns to name exoplanets seem like Shakespearean farce
The newfound planet is 96 light years away, but it's the closest twin to Jupiter astronomers have ever directly seen
After more than a year in orbit around a comet, the European Rosetta spacecraft and its icy dance partner are hitting a huge milestone: their closest approach to the sun
The Perseids are the most widely observed and dependable annual meteor display of the year
How “spacecoaches” could revolutionize interplanetary travel
China, Russia and the U.S. are developing and testing controversial new capabilities to wage war in space despite their denial of such work
Discovering the first true “alien Earth” is a long-held dream of astronomers. Recent exoplanet discoveries suggest that their dream will come true in the not-too-distant future...
Instruments on the Rosetta spacecraft’s Philae lander discovered nitrogen and amino acids, key ingredients for life, on comet 67P Churyumov-Gerasimenko
The mysterious gunk on Jupiter’s moon may be sea salt
Private funding for the Arecibo Observatory—the largest single-dish radio telescope in the world—may be a poison pill