In a far-off and infant planetary system, astronomers have for the first time observed a snow line. The find promises to reveal new information about the formation of planets and comets, as well as factors that determine the composition of the cosmic masses.
Mars once boasted a cushy atmosphere that mostly dissipated roughly 4 billion years ago, a pair of new papers report.
Earth will soon find itself at the center of eager paparazzi when not one but two NASA spacecraft - one studying Saturn and the other Mercury - move into place July 19 and 20 to photograph the blue planet.
Now that the initial excitement over the finding of a new moon orbiting Neptune has subsided, astronomers can get to the fun business of giving the distant moon a name more interesting than S/2004 N 1.
A possible delta where a mighty river may have once flowed into a vast ocean on Mars has been discovered by researchers at the California Institute of Technology (Caltech).
NASA's Curiosity Mars rover has officially hit the 1 kilometer mark (0.62 miles), the agency's Jet Propulsion Laboratory (JPL) announced on Wednesday.
By 2022, the most massive, powerful telescope in the history of the world will be in operation in Hawaii on the dormant volcano Mauna Kea, taking unprecedented images of deep outer space.
There's a good reason gold is pricey - the kind of explosions needed to create it only happen once every 10,000 years, a new study published in The Astrophysical Journal Letters argues.
Two NASA spacecraft have provided the most comprehensive video footage ever of a mysterious process that, scientists say, is at the heart of all space weather.
First spotted in 2011, a gas cloud several times the mass of the Earth has entered its death spiral around the black hole located at the center of the Milky Way.
A spacewalk outside the International Space Station was aborted after water began leaking into the helmet of astronaut Luca Parmitano about an hour and a half into a planned six-hour spacewalk, NASA reports.
No bigger than 12 miles across, and nearly coal-black in color, a new moon discovered orbiting Neptune is so faint that it evaded detection for the 167 years Neptune has been known, even as spacecraft flew by and discovered several of the planet's other 13 moons in the 1980s.
This year marks the peak of the Sun's 11-year solar weather cycle, and the star appears to be asleep in the job: what usually marks a period of violent outbursts is turning out to be a season so quiet that some are calling it the weakest solar maximum of the last 100 years.
As lunar tourism becomes a thing of increasingly less distant future, members of the Congress are starting to worry about preserving the legacy of Apollo 11- the first human landing on the moon.