The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner. Analysis of cosmological simulations published in Nature Astronomy reveal that ...

The Andromeda galaxy, our closest spiral neighbor to the Milky Way, becomes prominently visible in the night sky during October 2025, making it an ideal month for stargazers to observe this stunning ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

On Oct. 4, 1923, Edwin Hubble took a photographic plate of the Andromeda Nebula (as it was known then) using the 100-inch Hooker telescope at Mount Wilson. The next night, he took another plate and ...

This year, August serves a smorgasbord of celestial delights in both the morning and evening skies. In the west, Venus is still bright, though steadily sinking into the sunset. On Aug. 16, its beauty ...

"Beyond the Milky Way lie billions of other galaxies, drifting a few million light years from one another like lily pads floating on the surface of a pond." — Timothy Ferris in Seeing in the Dark A ...

How would you like to see the farthest thing visible to the naked eye? It’s possible, but you’ll need to bundle up and sit back on a lawn chair. Your neighbors may think you’ve cracked up sitting out ...

Stumped astronomers are trying to get to the bottom of the origins of a huge cloud of gas, or nebula, recently discovered floating near the Andromeda galaxy. The Andromeda Galaxy is one of the most ...