SUNSET: 
Experts Call for Urgent Action on Space Debris
A European conference on the status of space debris had experts calling for immediate action to not just prevent but actively clean up the problem.
New Comet SWAN Now Visible in Small Scopes
A new comet discovered in spacecraft images is bright enough to make you get out of bed before dawn.
Sky & Telescope Goes to Greenland
Despite inopportune clouds, Sky & Telescope's first tour to Greenland offered unforgettable adventures with enormous icebergs, sled dogs, and more.
Near-Earth Asteroid 2024 YR4 Might Aim for the Moon
The asteroid that will now definitely not hit Earth has the highest odds ever for a predicted lunar impact — but a miss is still more likely.
Astronomy in Pictures: From Cosmic Lenses to Dust Devils on Mars
Some cosmic perspective is a perfect cure for the Monday blues!
This Week's Sky at a Glance, April 4 – 12
The first-quarter Moon joins the Mars-Pollux-Castor trio, which are on their way to lining up straight. When the Moon turns full, it will meet Spica.
Webb Telescope Has Weighed in on Impact Odds for Asteroid 2024 YR4 (Updated)
So far, searches for archival images that could confirm or rule out the asteroid's impact have come up dry, but Webb observations in May could help pin down the orbit.
New Nova in the "Teapot," Algol Blinks, and Uranus Occults a Star
A new nova for early risers plus three fun observing projects for the week ahead.
Astronomy in Space with David Dickinson
SpaceX Launches Historic Polar Mission
A SpaceX Falcon 9 rocket lit up the skies over the Florida Space Coast Monday night, with the last mission of March 2025. Aboard were four crew members with a unique goal: to reach a polar orbit around the Earth.
April Podcast: Celestial Carnivores
This month we’ll watch bright planets come and go, track down some celestial carnivores, and enjoy a splash of mid-spring meteors. So grab your curiosity, and come along on this month’s Sky Tour episode.
Tiny Disks Shed Light on Super-Earth Origins
A team of astronomers has obtained high-resolution images of all known protoplanetary disks in the Lupus star-forming region.
This Week's Sky at a Glance, March 28 – April 6
While waiting for sunrise on eclipse morning, can you catch Venus rising as a tiny, thin crescent? Go out earlier while the sky is still dark, and you get a preview of July evenings with Scorpius on the meridian.
Sunrise Solar Eclipse on March 29th for Eastern North America
The March 29th partial solar eclipse offers unique opportunities for photography and viewing alike.
Cosmic Fog Lifted Earlier Than Expected
New observations show that the universe's first light penetrated the fog of the cosmic dark ages just 330 million years after the Big Bang.
T Coronae Borealis Isn't the Only Star Ready to Blow — Meet U Gem
As we wait on recurrent nova T CrB, dwarf nova U Geminorum is teeing up for its next 8-magnitude outburst.
New Data Hint at Changing Dark Energy — and a Different Cosmic Fate
New data hint that dark energy is weakening over time. If true, it means that our most trusted cosmological models may be wrong.
Flame Nebula Images Show Star Formation Turnover for the First Time
For the first time, researchers have identified a turnover in the initial mass function of a star cluster.
This Week's Sky at a Glance, March 21 – 30
If you're in the US northeast or eastern Canada, start planning for the sunrise partial eclipse on March 29th! In the night sky the stern of the ship Argo is at its highest, abutting the stern of Canis Major.
Pulsars Yield Dark Matter Density in Our Galactic Neighborhood
A new technique to measure the motions of pulsars for the first time enables more precise estimates of local dark matter density.
Euclid Observatory Opens Cosmic Treasure Trove
Euclid's first data release allows scientists to sharpen the tools they’ll need to unravel the nature of dark matter and dark energy.
