SUNSET: 
The Knife Edge Galaxy Throws Astronomers For a Loop
A 2008 image captured a stunning double loop of stars around an edge-on galaxy. Now, astronomers are questioning whether one of those loops exist.
Deep-sky Observing the Easy Way
Cold weather keeping you inside at night? Limit your time outdoors and make the most of your telescope time with these easy-to-find deep-sky gems.
What Snuffed Out Star Formation in This “Monster” Galaxy?
Astronomers have discovered a galaxy that formed five times as many stars as the Milky Way within 2 billion years after the Big Bang — but then quickly quelled any further starbirth.
How Young Galaxies Grow
A pair of recent studies sheds light on some of the universe’s earliest galaxies and how they grow.
Deep-sky Dive Into the Great Square of Pegasus
We return to Pegasus, but this time with a telescope to find a grab-bag of overlooked deep-sky treasures.
"Invisible" Galaxies Found in the Young Universe
Astronomers have discovered galaxies that have escaped detection until now, uncovering a missing link in galaxy evolution.
Why Are Two Ghost Galaxies Missing Dark Matter?
Ultra-diffuse galaxies are usually dark matter-rich. But astronomers have discovered two of these galaxies that lack dark matter altogether.
Tracing the Cigar Galaxy's Superwind
NASA’s SOFIA airborne observatory has returned a striking far-infrared view of the Cigar Galaxy and its “galactic superwind.”
Radio Survey Maps Hundreds of Thousands of New Galaxies
The LOFAR survey, based in The Netherlands, has released a bonanza of new sources. And with only 2% of the sky covered so far, this is only the beginning.
Deep-Sky Observing Without Equipment, Part II — The Winter Sky
Really want to see what your eyes can do? Leave the telescope at home and join me for a naked-eye tour of the late winter sky.
How to Turn Off a Galaxy’s Star Formation
New observations by the Atacama Large Millimeter/submillimeter Array (ALMA) provide a close look at a galaxy that may be in the process of shutting down its star formation.
The Magellanic Clouds Might Once Have Been a Trio
The Milky Way's two largest companion galaxies may have once been a threesome — but new data from the Gaia satellite leaves the satellites' history an open question.
60-Second Astro News: Starbirth, Stardeath, and the Evolution of Galaxies
Starbirth and stardeath light up a nearby galaxy while faraway galaxies twist and bend in these new images from NASA's Hubble and Chandra space observatories.
Andromeda Collided with Galactic Sibling Billions of Years Ago
A new study says our neighbor galaxy’s big stellar halo and stellar evolution are due to a major collision that ended 2 billion years ago.
M13 with a Side of Galaxies, Please
The Great Hercules Cluster is on everyone's observing list this summer. But there's lots more to see within a stone's throw of this grand object — like 20 galaxies!
Explore the Night with Bob King
Meet the Shy Side of the Local Group
The Local Group galaxies and their kin are the building blocks of the most magnificent galaxies in the universe. Let them inspire your winter nights.
Are You Ready, Willing, and Abell?
A cosmic rabbit hole in the tail of Leo will take you to Abell 1367, a wonderland of galaxies more than 300 million light-years from Earth. Step in and lose yourself in the vastness.
Super Spiral Galaxies
Astronomers have identified 53 “super spirals” — spiral galaxies that are huge and incredibly luminous — as part of a project exploring archived observations.
A Galaxy Hit-and-Run
Ripples found in the Milky Way’s disk reveal our galaxy survived an ancient hit-and-run. Now, astronomers might have caught the culprit.
Question Reopened: How do Galaxies Grow?
Evidence from observations sheds doubt on cosmic cannibalism as a source for galaxy growth, suggesting that instead galaxies grow by pulling in gas from the intergalactic medium.
