Galaxies are clouds of stars that range in both size and composition. Some contain hundreds of millions of stars while the largest galaxies can contain trillions of stars. And while it’s not entirely ...

The universe's expansion may actually have started to slow rather than accelerating at an ever-increasing rate as previously ...

The universe's first galaxies were hot messes, according to a recent study. During their younger days, they were wild, ...

JWST observations show that early galaxies were chaotic, gas-filled systems rather than stable disks. Researchers from ...

At the heart of the Milky Way, just 27,000 light-years from Earth, there is a supermassive black hole with a mass of more ...

Astronomers believe there are about 100 billion stars in the Milky Way. But, this number of stars depends on various factors. To figure out how many stars are in the Milky Way, astronomers have to ...

An international team led by ICREA researcher Mark Gieles, from the Institute of Cosmos Sciences of the University of ...

Q How many galaxies are in the universe? — Gus Powvens, Madison, Wis. A Jim Lattis, director of the UW Space Place at the University of Wisconsin-Madison: Galaxies are clouds of stars that range in ...