Astronomically speaking, the fall season comes to the Northern Hemisphere on Tuesday, September 23, 2014 at 02:29 UTC (Monday, September 22 at 10:29 p.m. EDT). At that moment, the Sun passes over the Earth’s equator heading south; this event is called the autumnal equinox.
On August 6th, the ESA's Rosetta spacecraft finally completed its decade-long voyage to Comet 67P/Churyumov-Gerasimenko.
Amateur astronomers have teamed up with the pros to produce four stunning multiwavelength images of galaxies M101, M81, M51, and Centaurus A.
The Mars rover Opportunity has been cleaned of heavy dust coating its solar panels, thanks to some strong winds blowing over the rim of Endeavour Crater.
Scientists have new insight into the damage caused by a Rhode Island–size asteroid that hit Earth more than 3 billion years ago, making the rock that wiped out the dinosaurs look like a lightweight.
NASA has a fully functioning spacecraft orbiting the Moon, all science goals completed, and a lunar eclipse coming up. It's a perfect opportunity to make some risky but potentially rewarding swoops within 2 miles of the lunar surface.
Mars is making its nearest and brightest appearance in the night sky since the end of 2007.
The European Space Agency’s comet-chasing spacecraft has imaged its destination for the first time since waking up from 957 days of hibernation.
Infrared observations of the Circinus Galaxy may help reveal the shape of the dusty region fueling its active galactic nucleus and shed light on what governs dust structures in other galaxies.
With the first interactive lunar north pole mosaic released by the NASA’s Lunar Reconnaissance Orbiter Camera team you can explore an area of the Moon’s northern hemisphere about the size of Alaska and Texas combined.
These stunning new images of spiral galaxy ESO 137-001 highlight its violent encounter with the intracluster plasma of Abell 3627, which is stripping away its gas and forming stars in the streamers.
Asteroid debris might be bombarding a radio pulsar in the constellation Puppis.
Astronomers have discovered a new “failed star” with unusually red, dusty skies. The dust makes the object look much younger than it actually is, complicating studies of this type of brown dwarf.
NASA’s Mars Reconnaissance Orbiter HiRISE camera captured this stunning image of a fresh impact on the Martian surface.
New compositional map of the main asteroid belt shows that minor planets are not strongly grouped by composition, as had been thought, but instead are mixed up.
Reports suggest that something went wrong as the Yutu rover prepared to hibernate through the long lunar night. The glitch could be the end of the little robot.
Mercury puts on its best show of the year for mid-northern latitudes around the end of January.
A new image of the Lagoon Nebula from the Paranal Observatory in Chile provides a stunning view the iconic object, which lies 5,000 light-years from Earth in Sagittarius.
Europe's comet-chasing spacecraft woke up after a 957-day-long hibernation to begin the most comprehensive comet study to date. Part of its mission: attempt to place an instrumented lander on a comet’s nucleus for the first time.
Gaia launched flawlessly Thursday morning at 9:12 UTC (4:12 a.m. Eastern Standard Time). This long-awaited mission will precisely map the distances and motions of 1 billion stars in our galaxy.
Comet ISON's untimely demise didn’t prevent scientists from studying it, revealing the comet to be smaller than previously thought and harboring high concentrations of carbon.
NASA's Cassini spacecraft has captured phenomenal images of the gigantic weather system at Saturn's north pole. This so-called "hexagon" is nearly three times wider than Earth is.
If all goes well, on December 14th the Moon will host its first soft-landing spacecraft since 1976.
A complex of three bright, star-forming clumps called Himiko is merging in the early universe. With its light reaching us from when the universe was only 800 million years old, this primordial galaxy could yield insight into the elusive process of early galaxy formation.
The Kepler team has released its analysis of the mission’s first three years of observations. The haul includes 10 Earth-size (and probably rocky) exoplanets in their stars’ habitable zones, and the stats show such planets are common.