"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 ... Galaxy can—when it's really dark, and you ...

This stunning space wallpaper reveals the distribution of dark matter, galaxies, and hot gas in the core of the merging galaxy cluster Abell 520, formed from a violent collision of massive galaxy ...

Astrophysicists generally accept that about 85 percent of all mass in the universe comes from exotic, still-hypothetical particles called dark matter. Our Milky Way galaxy, which appears as a ...

NASA’s Hubble Space Telescope has spied a brand-new blemish on the surface ... “dark vortex” has popped up in the planet’s atmosphere. No, this has nothing to do with the Guardians of the ...