Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

"It looks like it has been through some kind of event that caused it to form a lot of stars and then just shut down” ...

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 a colossal marvel in our sky, hosting over 1 trillion stars. Now, astronomers have used the Hubble ...

Moons orbit planets ... a little more complicated. Our galaxy is part of a collection of galaxies called the Local Group, ...