Andromeda XXXV is only about 20,000 times more massive than our Sun—very small, even for a satellite galaxy. For comparison, ...

"We thought they were basically all going to be fried because the entire universe turned into a vat of boiling oil." ...

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 ...

Andromeda XXXV, the smallest and faintest galaxy ever observed. Located three million light-years away, this miniature galaxy ...

Astronomers discover an 850,000 light-year-long cosmic filament in the early universe, providing insights into large-scale ...

Astronomers say they have traced a mysterious pulsing in the Milky Way to a surprising source: a dead star locked in a dance ...

The Milky Way is one of the biggest in the observable universe: Even if you traveled at the speed of light, it would take 100,000 years to go from one end of our home galaxy to the other.

This artist concept depicts a reconstruction of what the Firefly Sparkle galaxy looked like about 600 million years after the big bang if it wasn’t stretched and distorted by a natural effect known as ...

At the center of our galaxy, hidden behind dense clouds of gas and dust, the black hole Sagittarius A* rotates rapidly, ...

A discovery made by a team led by researchers at the University of Michigan tugs at the seams of some key cosmic lessons we ...

The infinity of the universe hides facts such as the one that has been uncovered in recent days. An object 13 times the size of the planet Jupiter is wandering uncontrollably throu ...

When we observe distant celestial objects, there is a possible catch: Is that star I am observing really as reddish as it ...