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Watch EarthSky’s Dave Adalian and the Bad Astronomer Phil Plait discuss the biggest black hole merger ever. The livestream drops at 12:15 p.m. CDT on July 18, 2025. Caltech published

This is the Webb telescope’s image of the Infinity galaxy, the result of 2 colliding spiral galaxies. It includes 2 rings of stars with the 2 nuclei of the spiral

Astronomers have, for the first time, caught the moment when planets began to form around a distant star. Using the ALMA telescope in Chile and the James Webb Space Telescope,

Artist’s concept of a dark dwarf, a dwarf star containing dark matter. A new study suggests that dark dwarfs in the center of the Milky Way – if they exist

View larger. | Is there life on Venus? This is an artist’s concept of molecules of biosignature gases, such as phosphine or ammonia in Venus’ atmosphere. The proposed VERVE mission

View larger. | When New Horizons arrived at Pluto in 2015, it found this large heart-shaped feature on the planet’s surface. Pluto’s “heart” measures approximately 1,000 miles (1,600 km) across.

That small moving dot is our new interstellar visitor, Comet 3I/ATLAS. A new study said it might be 7 billion years old, or 3 billion years older than our own

Artist’s concept of an overhead view of the Milky Way galaxy. New modeling and simulations show our galaxy should have about 80 to 100 more satellite galaxies than we’ve found

Plumes of ejecta stream from the little asteroid moon Dimorphos, after NASA’s DART mission spacecraft intentionally struck it on September 26, 2022. It was the world’s 1st planetary defense test. Image

An artist’s impression of the UK-led CosmoCube spacecraft. Its mission would be to listen for an ancient whisper from the cosmic Dark Ages on the far side of the moon.