An ultra-deep image from the National Science Foundation's Dark Energy Camera reveals a wide variety of galaxies in the ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

Ultra-faint dwarf galaxies, cosmic 'ghost towns,' offer new insights into the early universe and star formation.

As exotic as distant galaxies may seem ... Here are some of the most dizzying facts about our solar system.

These massive currents carry material on a journey through and around star-forming galaxies before they settle and form stars ...

The Andromeda Galaxy, our nearest galactic neighbor, is a majestic spiral galaxy like the Milky Way. Let’s uncover some ...

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

If the universe is 13.6 billion years old, how can astronomers see galaxies close to the Big Bang, which created the universe? That seems implausible and impossible — until you understand light.

Jamie Carter is an award-winning reporter who covers the night sky. How do galaxies form? For decades, that's been a mystery, but it may have finally been solved by a group of astronomers using ...

Galaxies like the Milky Way grow by merging with smaller galaxies over billions of years, unlike dwarf galaxies, which have ...