SUNSET: 
A Basketball-Player-Sized Asteroid
Planetary scientists have pinpointed the size of a near-Earth asteroid to be a mere 2 meters, one of the smallest ever characterized.
The Beginning of the End for Cassini
Cassini's final main engine burn this weekend sets up the first act of a grand finale.
Tour December's Sky: Orion Arising
Download our monthly astronomy podcast to track down Mercury in the evening sky. Then swing around to the east, to behold Orion, the mighty Hunter, climbing into the sk
IAU Standardizes 212 Traditional Star Names
Bringing order to chaos, the International Astronomical Union has approved standardized spellings and designations for the traditional names of 212 bright stars.
Orbital Path Podcast: In Search of Planet 9
Astronomers are debating the existence of a big planet beyond the orbits of Pluto and Neptune. Dr. Michelle Thaller talks with planetary scientists Scott Shepard and Mike Brown about when we'll discover it.
Keep Watch for November's Orionid Meteors
Although relatively obscure, this modest display is the strongest meteor shower in late November. Moonless skies make them easier to pick ou
Clarendon (c): Meteorite Find of a Lifetime
Dug out of a Texas field last year, the second-largest chondrite ever found in the U.S. has been donated to Texas Christian University.
Astronomers Discover Roundest Star
Asteroseismologists delving into the Kepler mission's data trove have found a star that appears to be more spherical than any natural object.
Sputnik Planitia Made Pluto's "Heart" Wander
A big, nitrogen-ice-filled basin has apparently caused Pluto's entire crust to shift over time.
Radio Bursts Herald Future Science
For the first time, astronomers have discovered a (potential) high-energy counterpart to a fast radio burst, and also used a different burst to probe the cosmic web.
Catch a NASA Launch This Weekend
There's a good chance to catch a rocket launch at dusk on Saturday night, when an Atlas V rocket with GOES-R takes to space.
An Off Year for the Leonid Meteor Shower
This year's display of Leonid meteors peaks on November 17th, but they'll be largely washed out thanks to strong interference from the Moon.
Embracing the "Supermoon," Hyped or Not
Much has been said and written about the Moon's proximity to Earth today. Is that a good thing or a bad thing?
New Clues on the Fate of Beagle 2
An innovative technique sheds new light on what doomed Britain's Beagle 2 spacecraft when it tried to land on Mars in 2003.
Planet-forming Disks Revealed in Striking Images
Three teams of astronomers used the SPHERE instrument on the Very Large Telescope to image protoplanetary disks around nearby stars and catch planet formation in action.
The "Supermoon" Observing Challenge
This month's full Moon will appear 16% larger in area than average. But can you tell just by looking at it? Maybe!
Runaway Black Hole Flees Behemoth Galaxy
Astronomers have spotted a supermassive black hole in a stripped-down galaxy racing away from a near-fatal close encounter in the center of a galaxy cluster.
Behold November's Super-Duper Supermoon
You won't want to miss the biggest, brightest full Moon in more than 68 years. Find out what makes this supermoon so special and how best to view it.
Curiosity Finds "Egg Rock" Iron Meteorite
NASA's intrepid Mars rover gets a close-up view of a bizarrely shaped space rock that landed on the lower slope of Mount Sharp.
Arecibo Observatory Faces Uncertain Future
Arecibo Observatory, the world's largest single-dish active radar telescope in the world, may be shut down or even destroyed due to funding concerns.
