Computer algorithms can model the universe, matching simulations to observations and revealing the distribution of dark ...

"And so their estimates put us at, like, 200 billion, maybe even 100 billion galaxies in the visible universe. "So somewhere between 2 trillion galaxies at the top edge and 100 billion at the ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

But Hubble had completely missed them because these galaxies emit very little visible light. The new study relies on observations from the Webb telescope, a pioneering spacecraft that launched in ...

The Milky Way has two prominent satellite galaxies, called the Large and Small Magellanic Clouds. (The Magellanic Clouds are visible on Earth only from the southern hemisphere; their existence was ...

The Messier catalog of deep sky objects was compiled by the comet hunter Charles Messier in the 18th century as a kind of list of "annoying things in the sky that are not comets", and includes many of ...

The visible universe—including Earth, the sun, other stars, and galaxies—is made of protons, neutrons, and electrons bundled together into atoms. Perhaps one of the most surprising discoveries ...

Andromeda being in the same Local Group as the Milky Way (the farthest object visible to the naked eye). Go farther out — using telescopes — and it's possible to see things like galaxies M81 ...

"This discovery poses a challenge to the Lambda Cold Dark Matter model, which may struggle to account for the formation of such small, aligned groups of galaxies in isolated environments.

A visible arc created by gravitational lensing ... In the Milky Way and nearby galaxies, such as the Andromeda Galaxy, astronomers can observe stars one by one. But for galaxies billions of ...