A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.

Andromeda is also a flattened spiral like the Milky Way, but it's twice as large — 220,000 light-years across versus 105,000 for the Milky Way — and crammed with a trillion suns. Can you even begin to ...

Add Yahoo as a preferred source to see more of our stories on Google. Astronomy can be a difficult topic for newcomers. Like any scientific field, it has its own jargon and buzzwords—and terms with ...

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 ...

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 ...

"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 ...

Thinking about watching 'Andromeda Nebula' without the hassle? Figuring out where to stream, rent, buy, or watch where to rent or buy the Evgeniy Sherstobitov directed movie can be harder than it ...

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 ...