SUNSET: 
Dwarf Galaxy Found by Amateur
Donatiello I is a tiny galaxy about 10 million light-years away, and it was discovered by an Italian hobbyist with a homemade telescope.
Source for Europa Geysers Missing
A new look at old data suggests there’s something missing from suspected plumes on Europa: a heat source.
Two Explosions with Similar Quirks
High-energy radiation released during the merger of two neutron stars last year has left astronomers puzzled. Could a burst of gamma rays from 2015 help us to piece together a coherent picture of both explosions?
Mission to Mercury Launches
The BepiColombo spacecraft, Europe's first mission to Mercury, rocketed away from Earth to begin its seven-year trek to the innermost planet.
60-Second Astro News: Infant Superclusters and Wavering Gamma Rays
In astronomy news this week: A gargantuan supercluster of galaxies lurks in the early universe, while data from the Fermi telescope hint at two supermassive black holes locked in a gravitational dance.
Some Moons Could Have Moons of Their Own
Four solar system satellites — and one putative exomoon — are big enough and far enough from their home worlds to hold onto tiny moons for billions of years.
Get Ready for International Observe the Moon Night
Fascinated by our Moon? Want to know more about it? Join fellow lunar enthusiasts on Saturday, October 20th, for International Observe the Moon Night!
Low-key supernova marks possible birth of neutron star duo
A massive star lost most of its mass before exploding and creating a neutron star — and a second nearby neutron star might have been the thief.
Observing Earth from the Moon
Ever wondered what it would be like to see the Earth from the Moon? Join Bob King as he explores this from the perspective of the Apollo 17 astronauts.
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.
Meet Deneb, the Bright but Distant Star
Deneb, in the constellation Cygnus, is a star that shines brilliantly despite being one of the farthest you can see with the unaided eye.
Fall Astronomy Day 2018
Curious about astronomy? No plans for Saturday? Well, you’re in luck! Saturday October 13 is Fall Astronomy Day and your local amateur astronomical community has all sorts of fun things in store for you.
Some Stars Around Galaxy May Be From Elsewhere
Data from the Gaia satellite reveal 20 new high-speed stars, 13 of which appear to have originated outside of the Milky Way.
Blast from the Past in Today’s Sky
Astronomers think they have identified the remnant of a supernova recorded by Chinese astronomers in AD 386.
Voyager 2 Approaches Interstellar Space
An increase in cosmic rays indicates that Voyager 2 is approaching the heliopause, where the solar wind gives way to the interstellar medium.
Hubble Hibernates After Minor Breakdown
A failure of a gyroscope used to point and stabilize the Hubble telescope caused the observatory to safely shut down while engineers determine a fix.
Video: The Glow of Spiraling Black Holes
New calculations reveal what two supermassive black holes about to merge would look like in ultraviolet and X-rays.
MASCOT Deploys from Hayabusa-2, Lands on Ryugu
The boxy robotic lander MASCOT delivered photos and other data from asteroid Ryugu during a brief 17-hour stay on the asteroid's surface.
Four Things We Now Know About Saturn
Cassini gave an epic final show, going where no space probe had gone before. Here are a few interesting things we learned from that finale.
Potential Trouble for Life on Icy Moons
A lack of dry land on moons such as Europa and Enceladus might make it difficult to seed oceans with phosphorus, an element essential for life as we know it.
