The red supergiant marking Orion's shoulder seems to be spinning too fast. Did it get a boost when merged with a smaller companion star 100,000 years ago?
New results from NASA's Dawn orbiter show that the largest asteroid (and acknowledged dwarf planet) must possess a global layer of water ice that lies just below its dark, dusty surface.
From humble beginnings in 2008, a simple idea — equipping libraries with loaner telescopes — has caught on across the United States.
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
Although relatively obscure, this modest display is the strongest meteor shower in late November. Moonless skies make them easier to pick ou
A big, nitrogen-ice-filled basin has apparently caused Pluto's entire crust to shift over time.
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.
Much has been said and written about the Moon's proximity to Earth today. Is that a good thing or a bad thing?
Thanks to two aggressive search programs, the count of near-Earth asteroids has soared past the 15,000-object milestone. (None of them are likely to hit us.)
Mark your calendar for Wednesday, November 9th, when you'll get great background info and travel tips for America's coast-to-coast total solar eclipse.
Mars is still hanging around, and Venus is climbing higher each evening. Download our monthly astronomy podcast to get more stargazing info.
A pair of high-resolution images taken from high above Mars appears to show the impact site of ESA's Schiaparelli lander.
Hubble images reveal a satellite orbiting one of the Kuiper Belt's biggest objects.
After a 7-month journey from Earth and a 139-minute rocket burn, the ExoMars Trace Gas Orbiter has settled in around its new home.
Planetary scientists haven't yet witnessed an active volcano on Venus, but a new study pinpoints a likely set of still-warm lava flows.
This year's awards from the Astronomical League showcase some talented high-school students and astronomy clubs throw great star parties.
Right now 2014 UZ244 lies nearly 14 billion kilometers away, ranking it third among the most distant objects known in the Kuiper Belt.
Newly released Hubble images show what appear to be towering jets of water coming from Jupiter's moon Europa.
This month is your last chance to catch Saturn in the evening sky. But Mars is still hanging around, and Venus is climbing higher each evening.
Back in January, a team of observers had a hunch that Comet 332P/Ikeya-Murakami was rapidly falling apart — and they were right!
Skywatchers in the Eastern Hemisphere will see tonight's full moon skirt through Earth's dusky outer shadow.
NASA's Curiosity rover took time out from its exploration of Mars to capture some dramatic layering in sandstone cliffs.
It's taken nearly two years, but a dedicated search of craggy Comet 67P/Churyumov-Gerasimenko has turned up the long-lost landing craft Philae.
Early evening features Mars and Saturn toward south, but keep an eye out for brilliant Venus climbing up from the west during twilight.
The Sun's second coverup of the year will be an annular solar eclipse whose path crosses south-central Africa and northern Madagascar on September 1st.