SUNSET: 
This Triplet of Stars Was Once a Quartet
Stellar mergers in quadruple systems might be common, a new study shows.
This Week's Sky at a Glance, July 1 – 9
The Moon waxes across the evening sky from Leo to Scorpius. The five-planet lineup in the dawn is now four. And amateur astronomers plan to be recording as Saturn's hazy moon Titan occult a star about as bright as Titan itself for most of North America.
July: Stars of the Summer Sky
July offers lots of pretty stars and constellations to check out, and you’ll get a personally guided tour of them by downloading this month’s Sky Tour astronomy podcast.
Citizen Science: Projects & Collaboration
Citizen Scientists Detect Dusty Disks
Disk Detective, a citizen science project dedicated identifying planet-forming disks around young stars, reports their latest results.
Successful Launch of Capstone, the Lunar Gateway Pathfinder
Capstone, a small pathfinder spacecraft with a big mission, launched today to pave the way for crewed return to the Moon.
Astronomy in Space with David Dickinson
Found: Booster Impact Crater on the Farside of the Moon
The Lunar Reconnaissance Orbiter mission has found the impact site created March 4th. The crater might help reveal the impactor's identity.
This Week's Sky at a Glance, June 24 – July 2
The crescent Moon returns to the evening, crossing Leo. The five-planet lineup continues at dawn; catch it while you still can. And for skywatchers at northern latitudes, we're entering noctilucent cloud season.
Supernovae Swept Out Barnard's Loop in Orion
Astronomers have mapped Orion in 3D to understand the origin of the large arc of Barnard’s Loop — and you can interact with the 3D image!
Wildfire Threatens Kitt Peak National Observatory
The Contreras wildfire has been threatening the historic Kitt Peak National Observatory in southern Arizona.
What we know about Light Pollution – and What We Don’t
The International Dark-Sky Association’s has summarized more than 300 peer-reviewed studies on the effects of artificial light at night in an effort to help dark-sky advocates.
Explore the Night with Bob King
Solar System Gets its Ducks in a Row
We'll have not one but many opportunities to enjoy a rare lineup of the bright planets over the next few weeks. Amazingly, they'll be aligned in order of their distance from the Sun.
This Week's Sky at a Glance, June 17 – 25
The five naked-eye planets form a diagonal line in the dawn this week — in order of their distance from the Sun, no less. And the waning Moon visits each one in turn, day by day.
A Strange White Dwarf with a Chaotic Past
New observations show that both rocky and icy worlds fell onto a white dwarf, indicating past orbital chaos in the system.
Life and Death in Nearby Galaxies
New images of nearby galaxies and their surroundings reveal details in galactic formation and evolution — and puzzles that remain to be solved.
Have We Found the First Rogue Black Hole in the Milky Way?
Hubble observations have revealed a stellar-mass compact object — a black hole or possibly a neutron star — wandering our galaxy.
The Gaia Revolution: New Data and Strange Stars
Astronomers will use the newest data release from the Gaia mission to explore stellar tsunamis, Milky Way history, and more.
Newest Starlink Satellites Have Gotten Brighter Again
Changes to the design of Starlink satellite spacecraft have made them brighter again, though still dimmer than the original design.
This Week's Sky at a Glance, June 10 – 18
The waxing gibbous Moon shines with Spica, then occults Delta Scorpii. Meanwhile, all seven planets other than Earth are forming into a diagonal line across the east to southeast at dawn.
Astronomy in Space with David Dickinson
Perseverance Watches Wild Winds on Mars
NASA’s Perseverance rover is recording the windy weather in Jezero Crater, chronicling its role in making the Red Planet dusty.
An Unusual Source Deepens Fast Radio Burst Mysteries
A new source of fast radio bursts raises questions about how much we really know about these mysterious flares.