There could be as many as 40 billion habitable Earth-size planets in the galaxy, according to a new study. WSJ's Monika Vosough reports.

An curved arrow pointing right. In 3.75 billion years, Earth's Milky Way Galaxy will collide with the Andromeda Galaxy. Over the next several billion years, the two galaxies will rip each other ...

Black holes are more common than you may think. There’s even one in our galaxy. Close enough for scientists to actually observe its destructive nature. Produced by Kevin Reilly and Rebecca ...

The biggest hole formed from a collapsed star in the Milky Way Galaxy resides 2,000 light years away from Earth in the Aquila ... the light sparks give away their position in the galaxy.

the most distant of which is more than a million light-years from Earth. That’s almost half the distance to Andromeda. This illustration shows the Milky Way galaxy's inner and outer halos.

A new view of the Milky Way: Warped and twisted Our galaxy, the Milky Way, is "warped and twisted" and not flat as previously thought, new research shows. Analysis of the brightest stars in the ...

These objects were actually the Andromeda and Messier 33 galaxies, the closest large galaxies to our Milky Way ... the speed at which a galaxy moves towards or away from Earth.