Scientists have detected one of the critical signs that the Voyager 1 is nearly in interstellar space. But this has happened before.
Astronomers say the Kepler mission found two mini-Neptune planets orbiting stars in a stellar cluster that would have been a most inhospitable environment at the time they were born.
Scientists have located three Centaurs – asteroid-comet hybrids – in Uranus's orbit, including one that's moving oddly in the planet's wake.
Saturn's icy moon Dione may hide a subsurface ocean, researchers say. They found clues to the hidden sea in the way a mountain range warped the surface of the frozen moon.
The Saturn-like planet has a well-studied cousin – the first alien planet found using the transit approach – to which it can be compared, right down to the makeup of its atmosphere.
A monster hurricane at Saturn's north pole, spotted by NASA's Cassini spacecraft, has an eye 1,250 miles wide and inner eye wall winds of 330 miles an hour. Its energy source is a mystery.
Russian scientists say that they have detected an "unidentified and unclassified" bacterium from a giant lake locked under Antarctic ice. But some have suggested that the samples could have been contaminated.
The Inspiration Mars Foundation, led by space tourist and multimillionaire Dennis Tito, announces its plan to send a married couple on a flyby mission to the Red Planet beginning in 2018.
Nicolaus Copernicus, whose 540th birthday is celebrated on Google's homepage Tuesday, kicked off the Scientific Revolution.
A new study calculates that the nearest Earth-like planet may be only 13 light-years away – and argues there may be more habitable planets out there than we thought.