Space
- Physics
Pulsar pair ripples spacetime
A pair of pulsars gives scientists the best evidence so far for gravitational waves, which have yet to be detected directly.
- Planetary Science
Cassini spacecraft preps for one last flyby of Enceladus
December 19 marks the last time the Cassini spacecraft flies in for a close look at the Saturnian moon Enceladus.
- Physics
General relativity caught in action around black hole
X-rays enable scientists to spot a black hole twisting the surrounding fabric of spacetime, just as Einstein’s theory predicts.
- Planetary Science
Ancient Mars’ weather report: Continued cold and dry
The assortment of water-carved features on the Martian surface suggest that ancient Mars was cold and fairly dry, not warm and wet.
- Planetary Science
Year in review: Pluto unveiled as a world like no other
Long out of reach, Pluto came into focus in 2015 with the New Horizons mission.
- Planetary Science
Year in review: Global ocean spans Enceladus
NASA's Cassini spacecraft is offering the best evidence yet that Saturn's moon Enceladus could be a great place to search for extraterrestrial life.
- Planetary Science
Year in review: Best evidence yet for water on Mars
New data from the Mars Reconaissance Orbiter supported the presence of salty water on Mars.
- Planetary Science
Comets-spewing-oxygen club gets new member
Halley’s comet becomes possibly the second comet known to be carting around oxygen buried since the formation of the solar system.
- Cosmology
Debate grows over whether X-rays are a sign of dark matter
The dwarf galaxy Draco, which is chock-full of dark matter, doesn’t emit a band of X-rays that researchers hoped were produced by the mysterious invisible stuff.
- Planetary Science
It’s a new planet! It’s an unknown star! It’s — oops!
A couple of unexpected wandering points of light in the sky could be new planets or even a dim star orbiting the sun, but researchers have plenty of reasons to be skeptical.
- Planetary Science
Salty source of Ceres’ mysterious bright spots found
Bright spots on Ceres contain salts from a possible subsurface layer of ice while ammonia-rich minerals hint at building blocks incorporated from the far outer solar system.
- Planetary Science
Japanese spacecraft reaches Venus — five years late
The Japanese Space Agency’s Akatsuki spacecraft succeeded at a second attempt at orbiting Venus, five years after an engine failure prevented its intended mission.
