According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

Scientists may have finally uncovered the mystery behind ultra-high-energy cosmic rays — the most powerful particles known in ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star ...

A black hole in a distant quasar is growing faster than the usual limit, according to Chandra observations. This may explain how the first supermassive black holes emerged. Astronomers have identified ...

Dark energy, which drives the accelerated expansion of the Universe, is assumed to be constant since the Universe began by ...

The discovery of a large population of compact, red objects, now widely known as Little Red Dots (LRDs) is one of the most ...

This article, originally titled "The Man Who Discovered the Universe," is from the Summer 2025 issue of Air & Space Quarterly ...

Bizarre NASA discoveries that we’re not allowed to talk about (but we will) Space exploration consistently reveals phenomena ...

At the heart of a quasar galaxy called RACS J0320-35, just 920 million years after the Big Bang, the black hole appears to be ...

Einstein’s version of dark energy is known as the cosmological constant. It implies a fixed amount of dark energy in each ...

Some things we see in space appear to outpace light. Now we are learning to harness these bizarre optical illusions to ...

Space. It's really, really big. How big is it? Well, according to astronomers, the observable universe is around 92 billion light-years in diameter, but that's all we can see (hence the word ...