Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

"We've always known that we need something to complete the puzzle, but we haven't really known what shape or form those ...

Astronomers may have uncovered a hidden population of galaxies that could rewrite what we know about the universe's evolution ...

Astronomers have peered back in time to find what looks like a population of "hidden" galaxies that could hold the key to ...

The potential finds could be contributing to some of the faintest light we can see in the universe, say researchers.

The discovery was made on a massive exoplanet known as K2-18b that for years has captivated scientists searching for life ...

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

In other words, the Big Wheel is in the universe’s old city: a very ancient and crowded part of the cosmos, in which galaxies intermingle, swapping star systems, asteroids, and dust in the process.

Euclid is on a quest to unravel one of the universe’s greatest mysteries: why it's expanding faster and faster. With help ...

Scientists using the James Webb Space Telescope have identified an ancient and faraway galaxy that provides evidence that an important transition period that brought the early universe out of its ...