Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

The galaxy, located in the constellation Leo, is about the same size as a star cluster within the Milky Way and is about the ...

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

Yale researchers among those who discovered three “ultra-massive” galaxies, which were formed shortly after the Big Bang and ...

The Hubble Space Telescope has generated the most comprehensive survey yet of the Andromeda galaxy, the nearest galactic neighbor to the Milky Way. The new mosaic of about 2.5 billion pixels yields ...

The Milky Way and thousands of other galaxies are drawn to "something": We have no idea what it is. The Great Attractor is a ...

Learn about the size, temperature, and colour of each planet, and discover why Pluto is no longer considered a planet.

Spur and gap features seen in Milky Way’s GD-1 stellar stream could be caused by a self-interacting dark matter subhalo. New research points to a dark matter subhalo as the architect behind the unique ...

The Milky Way galaxy, Andromeda, and all our respective ... a cosmic structure of mind-boggling size whose common gravitational center is known as the Great Attractor. With its combined mass ...