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

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 ...

If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

Learn how many stars there are in the Milky Way, and how astronomers count them.

For years, scientists have worked to chart the universe’s massive structure, aiming to test key models of cosmology. These efforts also help uncover how galaxies form and change over time. While most ...

Euclid Consortium, the international group that manages the European Space Agency’s Euclid space telescope, has published the ...

A monster galaxy from the early universe shows that the cosmos was rich with oxygen when it was only less than 3% of its present age, astronomers have found. The discovery raises questions about how ...

Earth and the surrounding Milky Way galaxy may be sitting inside a cosmic void—a "mysterious giant hole"—that could be speeding up the universe's expansion in our region compared to others, This is ...

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...

Periodically, the European Space Agency (ESA) releases images that provide breathtaking views of the cosmos, courtesy of its ...

In the name of open science, the multinational scientific collaboration COSMOS on Thursday has released the data behind the largest map of the universe. Called the COSMOS-Web field, the project, with ...

Even before the first stars lit up the Universe, the Cosmos was not the cold place most researchers once imagined. New ...