SUNSET: 
Four Exoplanets Might Orbit Sun-like Star
Astronomers have used an innovative technique to discover four super-Earth-size planet candidates orbiting Tau Ceti, a Sun-like star 12 light-years away.
Best Exomoon Candidate Yet?
Astronomers have found one of the best exomoon candidates in data collected by the Kepler spacecraft.
New Age Estimate for TRAPPIST-1
A new study suggests that the seven-planet dwarf star could be much older than the Sun.
2017's Solar Eclipse for the Rest of Us
Totality watchers get the best show, but a far greater number of people will be in partial eclipse territory. Here's how to make the most of it.
Solar Eclipse Apps You'll Need on Eclipse Day
Want to know when the eclipse begins and ends in your hometown, or what's the quickest way to the path of totality? Looking for an eclipse countdown timer? There are eclipse apps for that!
Huge Storm Rages on Neptune
A huge, white storm is raging on Neptune, and its location is baffling astronomers. How can a storm system this large exist at the planet's equator?
How Do Earth-Sized, Short-Period Planets Form?
Matching theory to observation often requires creative detective work. In a new study, scientists have used a clever test to reveal clues about the birth of speedy, Earth-sized planets.
Rogue Planets: Not as Plentiful as Thought
A new study finds that rogue planets — those floating free in the galaxy, unbound to any star — are not as plentiful as we once thought.
Putting the Brakes on the Stellar Baby Boom
Two studies of distant galaxy clusters point to different mechanisms of stopping the baby boom that reigned in the early universe.
The Perseids: Big Eclipse's Opening Act
The upcoming total solar eclipse is understandably getting a lot of attention, but don't overlook the trusty Perseids. They'll be getting things warmed up Saturday night.
Curiosity's Discoveries on Mars
After four Earth years on the Red Planet, the intrepid rover has found evidence of long-gone water and habitable environments.
New Horizons' 2019 Target: A Binary Body?
A challenging and intensive campaign by telescope-toting teams yields big-time results on the body that the New Horizons spacecraft will fly past in 17 months.
Sun's Waves Reveal Core's Spin
Solar astronomers may have finally detected gravity waves in our star’s core, revealing that the Sun’s central region rotates about four times faster than the outer layers.
Chasing the Total Solar Eclipse From Orbit
While millions will watch the August 21 total solar eclipse from the ground, International Space Station crew will have an amazing view high from overhead.
Total Solar Eclipse: All-Sky Maps
Wondering what you'll see during the total solar eclipse on August 21st? Use our all-sky maps to figure it out!
August 7th's Partial Lunar Eclipse
Two weeks before the much-awaited solar eclipse, the Moon clips Earth's umbra to create a partial lunar eclipse visible from the Eastern Hemisphere.
Exoplanet Might Have Ozone-like Layer
Astronomers have potentially detected a stratosphere in the atmosphere of a hot Jupiter.
AAS's Advice for Safe Solar-Eclipse Viewing
Due to alarming reports of potentially unsafe eclipse viewers as eclipse day approaches, the American Astronomical Society has revised its safety advice.
How to Read the Weather the Day Before the Eclipse
Weather will play a crucial role on eclipse day. Meteorologist and eclipsophile Jay Anderson shares his tips for predicting the unpredictable: eclipse weather.
Saturn Surprises Right Up Until Cassini's End
Saturn keeps its secrets as NASA's Cassini spacecraft heads towards its September grand finale.
