Stevenson 218 is the largest known star in the universe, located about 18,900 light-years away in the constellation of Scutum and far surpassing even the sun in size and brightness. So immense that it ...

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

A black hole in a distant quasar is growing faster than the usual limit, according to Chandra observations. This may explain ...

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 ...

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 ...

The known universe is full of shockingly huge things. Here are the largest planets, stars, galaxies, and structures we've observed in the universe so far.

Using the world’s largest digital camera, Rubin will capture a full view of the southern sky every three days.