Some things in cosmology may simply be unknowable. Why is there something rather than nothing? What lies outside the universe? What is inside a black hole? That last one has been niggling at ...

What do we really know about black holes? We've only recently even gotten a visual of an actual black hole, so not a lot. But although we can now see a black hole, can we see through a black hole? And ...

The team discovered the star by analyzing archival data from NASA’s NEOWISE mission. They used a prediction from the 1970s that theorized that when a star underwent direct collapse, it would leave ...

When Kareem El-Badry picked up an unknown phone call at 7 a.m., he didn’t expect to hear the words that would change his career. “They said, this is so and so from the MacArthur Foundation. And I was ...

Scientists flew the XL-Calibur telescope on a high-altitude balloon to measure polarized X-rays from Cygnus X-1. These measurements reveal details about the chaotic, superheated material swirling ...

What do we really know about black holes? Are they even black? Are they even holes?

Supermassive black holes may not be as massive as previously thought, according to a new discovery by scientists. Astronomers from the University of Southampton, working with colleagues from France, ...

Hypothetical dark matter stars known as "boson stars" could leave telltale ripples across the cosmos, offering researchers a new way to probe the invisible forces shaping the universe. In 2019, a ...

One of the greatest mysteries in cosmology is the nature of what we refer to as dark energy. This mysterious force drives the expansion of the universe to accelerate. Dark energy is an unknown ...

The early universe appears to be littered with enormous star-like balls of gas powered by a black hole at their core, a finding that has taken astronomers by surprise and might solve one of the ...