The historic mission to explore a comet ends in dramatic fashion on September 30th.
A stunning double star, Albireo is also a bit of an enigma. Is it a true binary or the result of a chance alignment?
A team in Argentina unearths a spectacular space rock, possibly the world's third largest single find.
In an age when UFO sightings are rife, we look at other possibilities that may help to explain the strange apparitions many see.
NASA's Osiris-REX spacecraft launched successfully from Cape Canaveral on September 8th and is headed to asteroid Bennu for a dramatic sample return mission.
With this week's waxing Moon, we set off to explore its volcanic past with a look at a dozen intriguing lunar domes.
On August 27th, NASA's Juno made its closest pass to the giant planet — here's what we learned.
You can't get rid of noise in your astrophotographs, but you can reduce its impact with more signal.
Throw open the door and welcome back Orion at dawn. The Hunter's return brings relief from the heat and gives us a fresh shot at exploring untouched winter deep-sky objects in comfort.
It’s easy, but wrong, to take for granted a mission that’s still going strong after a decade.
Bees see polarized light and use it to navigate to honey. Learn how you can use it to crack the Egg Nebula.
Feared lost for almost two years, NASA's Stereo B solar observatory is now back in (tentative) contact with mission control.
The discovery of trans-Neptunian object 2011 KT19 in a strange orbit deepens a key mystery in the outer solar system.
The intriguing Palomar globular clusters will challenge observers with modest to large telescopes, while providing a satisfying ramble around the galactic halo.
Make a connection to a time when stars were used to track seasons and predict natural events by watching the heliacal rising of Sirius.
JAXA and NASA are looking at the possibility of replacing the dead Hitomi X-ray observatory, with a potential launch around 2020.
An otherwise faint and distant periodic comet underwent a bright outburst at the end of last month. Now it's visible in amateur telescopes at nightfall.
Learn how to photograph a meteor shower with these step-by-step instructions, as well as advice for the advanced imager.
The meteors are coming! Three annual meteor showers are already active and guaranteed to spark up your summer nights.
The Mars 2020 rover reached a third crucial milestone this past week on the path to the launch pad.
Now you see 'em, now you don't. Watch the Moon occult Neptune and nearby Lambda Aquarii on the same night.
Take an imaginary journey in a boat down the Milky Way's Great Rift, exploring rich star clouds and dark nebulae along the way.
A survey of free services and apps that let you keep tabs on space weather so you can anticipate the next great aurora.
After a 5-year-long journey, NASA's latest emissary to the largest planet in the solar system has arrived at its destination.
Few amateurs have looked through a telescope and not imagined what it would be like to take a photo of the target in the eyepiece. I know I did when I got my first telescope. But back then, astrophotography was practically a black art: 35mm film was the only medium of choice, and it required…