The nearby star Fomalhaut does host a massive exoplanet after all, say NASA scientists following a second look at Hubble data.
NASA's Cassini spacecraft has been watching the aftermath of the largest and hottest stratospheric vortex ever detected in our solar system.
Dark matter halos — the huge, invisible cocoons of mass that envelop entire galaxies and account for most of the matter in the universe — may not be so dark after all.
An international team of astronomers has created a catalogue of more than 84 million stars in the central parts of the Milky Way using a 9-gigapixel image from the VISTA infrared survey telescope.
NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) has taken its first look at the giant black hole at the center of our galaxy - and caught it right in the middle of a flare-up.
Three new crew members have set sail to join their Expedition 33 crewmates onboard the International Space Station (ISS).
University of Arkansas researchers have come up with an explanation of how water on Mars could produce the flow patterns observed by NASA's Mars Reconnaissance Orbiter.
The European Space Agency (ESA) has awarded funding to a project aimed at identifying Earth-like planets that could be capable of supporting life.
Astronomers have snapped a supersonic jet of material blasting over two million light years from the centre of a distant galaxy.
NASA scientists have discovered an unexpected pattern of change in hundreds of galaxies observed by the Keck and Hubble space telescopes.
NASA astronomers describe NGC 3344 as a "glorious" spiral galaxy around half the size of the Milky Way, which lies some 25 million light-years distant.
NASA's Mars rover Curiosity has chomped up its first solid sample, taking it into its Chemistry and Mineralogy (CheMin) instrument for analysis.
A spacecraft really wouldn't be a great place to suffer from, say, salmonella poisoning - but new research indicates that microgravity and prolonged space flight could give unique advantages to germs.
NASA’s Voyager probe swept past Uranus in 1986, but yielded few new details of the planet and its atmosphere.
Two professors say that the unusual moons of Saturn could be explained by several large impacts in which several major satellites merged to form Titan.
It's long been theorized that the moon was created when a Mars-sized proto-planet slammed into the Earth. Unfortunately, though, the chemistry of the two bodies has stubbornly failed to bear this out.
NASA's New Horizons spacecraft - now just two years away from Pluto - is on a riskier mission than previously realized, thanks to the threat posed bty the planet's moons and possible rings.
European astronomers have discovered an Earth-sized planet right next door in the Alpha Centauri system.
NASA's Wide-field Infrared Survey Explorer, WISE, has uncovered new clues about the Jovian Trojans - asteroids that orbit the sun on the same path as Jupiter in two 'packs'.
Two amateur astronomers have discovered the first example of a planet orbiting twin suns that is itself orbited by a second distant pair of stars.