Before our minds start to reel at these scales, let's return to the Andromeda Galaxy and examine it from our vantage point on the dust-grain planet we call Earth. The remarkable thing is that the ...

The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner.

Here's how to see it: Planetary alignments aren’t rare, but 6 visible planets are. Hubble, with its sharp imaging capabilities, detected more than 200 million stars in the Andromeda galaxy that ...

The newly discovered comet, C/2025 F2 (SWAN), is racing toward the Sun, and it may not survive its closest approach.

Gravity will likely tug the Sun into a new orbit, dragging Earth and the other planets with it. But even though the Milky Way and Andromeda each have 100 billion stars, it's unlikely that many ...

The cluster, full of more than 2,500 newborn stars that blaze blue in the Hubble image, is in a galaxy with far fewer heavy chemical substances than the Milky Way. It's mostly made of hydrogen and ...