According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density – given that the universe contains a lot of relatively empty space, could ...

This article explores how our understanding of the universe has evolved—from the scale of everyday experience down to the Planck length ...

What is the biggest object in the universe? Learn more about the biggest objects in the universe, including galaxies, galaxy clusters, and dark matter.

Astronomers have made an exciting breakthrough in the search for the universe’s most mysterious substance—dark matter. They have discovered the lowest-mass dark object ever detected using a powerful ...

Using observations from the James Webb Space Telescope, astrophysicists have spotted what they say is compelling evidence of a new type of cosmic object called a 'dark star.' ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star, dubbed M31-V1, was key to showing that the universe extended far beyond ...

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 ...

A star found in the Large Magellanic Cloud is remarkably unpolluted by heavier elements, suggesting it is descended from the universe’s earliest stars ...

Mathematical quirks of our universe have led some cosmologists to wonder whether the cosmos was actually born in a black hole.

A black hole unlike any seen before has been spotted in the early universe. It’s huge and appears to be essentially on its own, with few stars circling it. The object, which may represent a whole new ...