Researchers have spent the past few years watching a black hole re-awaken roughly 300 million light-years away from Earth.

A project to map galaxies across the universe may have spied cracks in the foundation of our understanding of the cosmos.

The DESI experiment shocked cosmologists with a hint that dark energy varies over time. Now, with more data, the conclusions hold up.

"We are seeing the first steps towards making the earliest stars and galaxies," she said. "And we're not just seeing light and dark ... from the cosmic microwave background (CMB).

Right after launching, a bunch of satellites heading to join the megaconstellation looks like a string of moving stars going ...

In recent years, one of the most troubling puzzles in astrophysics has grown more urgent. Scientists have realized that the ...

Measuring light, known as the cosmic microwave background ... in stars and are just a sprinkling on top of this cosmic stew. "Another 500 zetta-suns of mass is in the invisible dark matter ...

Scientists are using an array of instruments to detect other planets, some of which may harbor life—and others that most ...

Experts have unveiled the most detailed images yet of the universe’s infancy, capturing light that traveled for more than 13 ...