Sky & Telescope

The Vera C. Rubin Observatory will discover up to 500,000 solar system objects every year. It’s already starting to deliver on that promise. The post Rubin Observatory Announces 11,000 New Asteroids appeared first on Sky & Telescope.

A thin crescent Moon points the way to super-difficult Mercury and Mars low in the dawn, then the opposite crescent plays with bold Venus and the Pleiades in evening twilight. The post This Week's Sky at a Glance, April 10 – 19 appeared first on Sky & Telescope.

The weekend of April 11–12 marks the return of the world’s largest astronomy and space expo with telescopes, cameras, and activities for the entire family.   The post Join Us at the 35th Annual Northeast Astronomy Forum appeared first on Sky & Telescope.

Scientists have unveiled a new dynamic view of our world at night, showing for the first time a night-by-night view of changes in light pollution. The post Light Pollution Is Increasingly Variable Around the World appeared first on Sky & Telescope.

The Artemis 2 crew set records and provided amazing views — with more to come — as they journeyed around the Moon. The post Amazing Views From Artemis 2’s Historic Lunar Flyby appeared first on Sky & Telescope.

A glimpse of a stellar cluster ties generations together. The post When Astronomy Is In Your Blood appeared first on Sky & Telescope.

New observations reveal that permanently shadowed regions at the lunar poles might contain less water ice than astronauts were hoping for. The post Do the Moon’s Poles Hold Less Water Than We Thought? appeared first on Sky & Telescope.

Arcturus, the Spring Star, is on its way up in the east. Vega, the Summer Star, rises later in the evening. Jupiter shines high toward the southwest. The post This Week's Sky at a Glance, April 3 – 12 appeared first on Sky & Telescope.

If we're lucky, we'll soon have bright comets at both dawn and dusk. The post Dawn Comet C/2025 R3 (PanSTARRS) May Hold a Surprise appeared first on Sky & Telescope.

NASA’s Artemis 2 mission has departed Earth, as humans return to cis-lunar space after more than 50 years. The post Artemis 2 Mission Launches for Trip Around the Moon appeared first on Sky & Telescope.

From pizza "flavor zones" around stars to therapy sessions for black holes, astronomers are in fine form on this April 1st. The post Astronomers Play April Fool’s appeared first on Sky & Telescope.

Astronomers disagree on whether they’ve found evidence that stars don’t make certain sizes of black hole. The post Have We Found the Black Hole Desert? appeared first on Sky & Telescope.

Striking images from Hubble, Webb, and the Very Large Telescope dive into Saturn's atmosphere, capture the Crab Nebula's expansion, and reveal a newborn planet. The post New Astro Images: Saturn, the Crab Nebula, and a Newborn Planet appeared first on Sky & Telescope.

This month’s episode showcases the stars and planets visible on April evenings. We’ll explore full-Moon quirks; spot Venus and Jupiter after sunset; learn about Gemini, the celestial twins; and hunt for meteors toward month’s end. So grab your curiosity, and come along on this month’s Sky Tour. The post April Podcast: Spotlight on Gemini appeared first on Sky & Telescope.

Powerful X-rays from the nearby naked-eye star Gamma Cas mystified astronomers for decades. Now, a new observatory reveals that they come from its white dwarf companion. The post White Dwarf Discovered Gobbling Material from Gamma Cassiopeia appeared first on Sky & Telescope.

Winter's gone, but the Winter Triangle remains (for now). Trace out this gigantic asterism right after dark before it sinks. Jupiter glares inside its top. The post This Week's Sky at a Glance, March 27 – April 5 appeared first on Sky & Telescope.

The Hubble Space Telescope caught a long-period comet breaking up just after it passed the Sun. The post Comet Break-Up Caught In Action appeared first on Sky & Telescope.

New analysis shows alkaline and acidic water may have mixed beneath the Martian surface, creating an environment that could theoretically have supported life. The post Many Waters May Have Mixed on Mars appeared first on Sky & Telescope.

Two brown dwarfs are whipping around each other in a tight tango — an unexpected dance for objects that are not-quite-stars and not-quite-planets. The post Brown Dwarfs Dance Unexpected Tango appeared first on Sky & Telescope.

A new analysis of samples from the asteroid Bennu has solved a long-standing mystery: Cracks in the boulders strewn across its surface masquerade as sand. The post NASA Has Cracked the Mystery of Asteroid Bennu’s Boulders appeared first on Sky & Telescope.