SUNSET: 
Dark Energy Survey Instrument Sees First Light
The Dark Energy Spectroscopic Instrument is poised to record millions of galaxies as far back as 11 billion years ago to unveil the nature of dark energy.
Citizen Science with the Transit of Mercury
If you're planning on watching the November 11th transit of Mercury, try kicking it up a notch — watch with a friend and calculate the distance between Earth and the Sun!
"Potentially Hazardous" Asteroid Is Headed For Your Telescope
A potentially hazardous asteroid makes a flyby of Earth this Friday, offering amateurs with modest telescopes a chance to ride along.
Bubbles, Heated Clouds Point to Active Past for Galactic Center
Two studies support the suspicion that our galaxy’s black hole had one or more outbursts a few million years ago.
Crack Your Crescent Moon Record
Calling all crescent lovers! Here's a chance to set a new personal record by seeing one of the oldest moons ever.
First Light for German X-ray Telescope EROSITA
The EROSITA X-ray telescope aboard the German-Russian Spektr-RG satellite has taken its first images of the hot universe.
Well-loved Astronomy Expo Comes to an End
The RTMC Astronomy Expo, a favorite yearly convo of amateur astronomers and telescope makers, is ending. The author takes a look back at the meeting's glory days.
Interstellar Comet Borisov "Indistinguishable" from Solar System Comets
The solar system's newest interstellar visitor, Comet 2I/Borisov, bears a striking resemblance to the icy population of the outer solar system.
Autumn Comets, Mira's Eye & The Orionid Meteor Shower
Four comets, a famous variable star, and sprinkles of dust from Halley's Comet are highlights of the October sky.
Should We Blame Pulsars for Too Much Antimatter?
A new study suggests that pulsars are not the source of an unexpected surplus of antimatter particles detected by a space-based experiment. Dark matter remains a viable alternative explanation.
NASA Launches ICON to Explore Earth's Ionosphere
NASA's Ionospheric Connection Explorer (ICON) launched successfully today to explore the boundary between Earth and space.
More Black Hole Mergers Found in LIGO Data
Analysis by an independent team has ferreted out seven candidates for gravitational-wave events from merging black holes.
Barbara Wilson — A Remembrance
Barbara Wilson passed away on September 24, 2019, after battling cancer for several months. Barbara was very well known in the amateur astronomy community as a dedicated and talented deep-sky observer. But she was much more than that.
Help Name Saturn’s 20 Newfound Moons
Astronomers have found 20 new moons circling Saturn — now you can help name them!
Nobel Prize Honors Exoplanets, Big Bang Discoveries
The 2019 Nobel Prize in Physics goes to James Peebles and to Michel Mayor and Didier Queloz. The prize, which will be split in half, honors discoveries that have offered new perspectives on our place in the universe.
Work to Save NASA's "Mole" on Mars Continues
NASA engineers hope to use the scoop at the end of the lander's robotic arm to get the Insight lander's heat probe burrowing once again.
Best Image Yet of the Cosmic Web
Using the light cast by galaxies bursting with new stars, astronomers have mapped out a piece of the cosmic web 12 billion light-years from Earth.
International Observe the Moon Night 2019
Observe the first-quarter Moon on October 5 for International Observe the Moon Night. Here's a guide to tell you what to look for.
Exotic Messenger Probes a Galaxy’s Outer Reaches
Astronomers made use of a fast radio burst, a 40-microsecond flash at radio wavelengths, to evaluate the state of the nearly undetectable gas around an intervening galaxy.
Treasure Hunting in the Hall of the Deep-Sky King
Cepheus, the King, has hidden his treasure well but not so much that curious amateurs can't find more than enough to stuff their pockets.
