For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...
A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.
A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding ...
A new composite image of the Andromeda Galaxy is offering an unprecedented view of our closest spiral galactic neighbor. Composed by NASA and international space partners, the image combines data from ...
On a clear night, the Milky Way and the Andromeda galaxy look like close neighbors. In space, they really are.
Astronomers have caught a massive star in the Andromeda Galaxy quietly dying, collapsing into a black hole without producing a supernova, leaving behind little more than a fading trace. The findings ...
A new composite image of the Andromeda Galaxy is offering an unprecedented view of our closest spiral galactic neighbor. Composed by NASA and international space partners, the image combines data from ...