The evidence is piling up that the building blocks of life could have been brought to Earth by comets, after emerging in the dust of interplanetary space.
Astronomers have found the strongest evidence yet that the ocean on Jupiter's moon Europa may consist of salty water, like our own. And, they say, that salty water appears to be making its way to the surface.
NASA's Cassini spacecraft spots the bright, cloudy terrestrial planet, Venus, as it peers over the shoulder of giant Saturn, through its rings, and across interplanetary space.
The Curiosity ground team has been forced to switch the Mars rover to a redundant onboard computer, thanks to a memory problem.
As NASA's SpaceX Dragon spacecraft docks with the ISS, its head, Charles Bolden, has warned that recent political events could impact the agency's mission.
The first NASA spacecraft designed to fly astronauts beyond Earth orbit since the Apollo era of yore is apparently well on its way to making a flight test next year.
It may look like something from "The Lord of the Rings," trilogy (think the Eye of Sauron), but this fiery swirl is actually a real-life planetary nebula known as ESO 456-67 imaged by NASA's Hubble space telescope.
SpaceX managed to successfully launch its third flight to the International Space Station (ISS) this morning despite an issue with the Dragon spacecraft's thruster pods.
Two prebiotic molecules - one related to DNA and the other to an amino acid - have been identified in a gas cloud near the center of the Milky Way.
The Earth temporarily gained a third radiation belt last year, NASA's Van Allen Probes mission has revealed.
NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) and the European Space Agency's XMM-Newton, have together accurately measured, for the first time, the spin rate of a black hole with a mass two million times that of our sun.
The world's first space tourist, Dennis Tito, has announced plans for a manned fly-by of Mars - crewed, he suggests, by a married couple.
Phonesat STRaND-1 - a nanosatellite carrying a Google Nexus One smartphone - was launched into orbit from India earlier this week.
Astronomers say they've tracked down the source of the meteorite that burned up over Russia earlier this month, injuring more than 1,000 people.
Life may well exist on planets orbiting dying stars - and, if it does, there's a good chance we'll find it within the next decade, say astrophysicists.
NASA's Hubble space telescope has captured an image of HH 151, a bright jet of glowing material trailed by an intricate, orange-hued plume of gas and dust.
Mercury may once have had a large ocean of magma, Messenger data shows, shortly after its formation about 4.5 billion years ago.
Black holes shape the growth and death of the stars around them via powerful gravitational pulses and explosive ejections of energy.
NASA's Kepler mission has found the smallest planet yet around a star similar to our sun.
NASA's Curiosity rover has successfully extracted a sample from a Martian rock - the first ever to be collected from a planet beyond Earth.