SUNSET: 
Walter H. Haas (1917–2015)
Amateur astronomy has lost a true pioneer, a keen observer who founded the worldwide Association of Lunar and Planetary Observers.
Watching Starbirth in Real Time
A team of astronomers compared two images taken 18 years apart to catch the dramatic evolution of a forming star and its surroundings.
The Lunar Eclipse Wasn't Total After All?!
In a borderline eclipse of the Moon like last Saturday's, the difference between "total" and "partial" depends on some crucial assumptions.
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Saturday's Lunar Eclipse: Not Total?
Most sources say April 4th's lunar eclipse will be total, though only barely so. However, those calculations have overlooked a subtle factor that might render the event only "partial."
New Horizons: Navigating to Pluto
In the first of a series of installments written exclusively for Sky & Telescope, New Horizons principal investigator Alan Stern offers his behind-the-scenes perspective on what it took to get the spacecraft to Pluto.
Saturday Morning's Total Lunar Eclipse
An unusually brief total eclipse of the Moon will be visible before dawn this Saturday, April 4th, from western North America. The eclipse happens on Saturday evening for Australia and East Asia.
Dragons and Venus Arise to Fool
On April 1st astronomers and other important folk got serious about science jokes in an annual tradition of scientific tomfoolery.
We're All In This Together: Lunar Totality
There's much to take in during Saturday morning's total lunar eclipse, including a rare Moon-galaxy pairing, the splendid summer Milky Way, and a chance to see your shadow reach all the way to the Moon.
Tour April's Sky: Critters on the March
The stars of northern winter linger in the west as celestial bears, a lion, and a snake climb in the east. Meanwhile, Jupiter and Venus sparkle overhead.
How Slippery Is Dark Matter?
Dozens of galaxy clusters confirm that dark matter particles slip right past each other within messy cluster mergers.
NASA Selects Asteroid Mission Concept
NASA has selected the design for its Asteroid Redirect Mission, opting to retrieve a boulder from a larger asteroid.
MAVEN Spots Dust Cloud, Aurora on Mars
NASA’s MAVEN spacecraft has detected dust high in Mars’s atmosphere and auroras across the planet’s northern hemisphere.
Reports from March 20th's Total Solar Eclipse
With risky prospects on far-northern islands and at a premium aboard aircraft, observers looked on with awe as the Moon's shadow swept across the Arctic Ocean
New Dwarf Galaxies Near Milky Way
Astronomers have found a set of new dwarf galaxy candidates near the Milky Way Galaxy, a discovery crucial to understanding dark matter.
Getting to Totality: Not Easy!
As the countdown for Friday's total solar eclipse nears zero, "umbraphiles" from around the world are flocking to remote parts of the far north in the hope of finding clear skies.
Nova (Nova Sagittarii 2015 No. 2) Erupts in Sagittarius
A 6th-magnitude nova has erupted inside the Sagittarius Teapot. It may (or may not) still be brightening.
Messenger Reveals Mercury Mysteries
With just weeks left before it crashes into its host planet, NASA's Messenger spacecraft is making the most of its extremely low altitude and finding that Mercury isn't a completely dead world.
Ripples in the Milky Way
Astronomers have detected what look like four undulations in the Milky Way Galaxy’s disk. If the structures are all part of the disk, our galaxy is more than half again as large as we thought it was.
Magnetosphere Mission Launches
With the goal of better understanding Earth’s space weather environment, NASA’s Magnetospheric Multiscale (MMS) mission launched just over an hour before midnight on March 12th from Cape Canaveral.
Lots of Lunar Layers Under Chang'e 3
A radar sounder aboard China's first-ever lunar lander found at least nine discrete subsurface layers at its landing site in northern Mare Imbrium.
