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

Harvard astrophysicist Avi Loeb suggests interstellar object 3I/ATLAS could be far more massive than previously thought.

The team is the first to detect hydroxyl (OH) gas, a chemical fingerprint of water, emanating from 3I/ATLAS.  Scientists find water signature on enormous interstellar comet 3I/ATLAS is the third ...

A 54-pound (25-kilogram) meteorite – the largest Martian rock ever found on Earth –is now the subject of an investigation in Niger. The meteorite fetched more than US$5 million (£3.71 million) at an ...

A black hole with a mass equivalent to 36 billion suns—10,000 times heavier than the one at the center of the Milky Way—has been discovered around 5 billion light-years from Earth. It may be the ...

Using the European Southern Observatory 's (ESO) Very Large Telescope (VLT), astronomers have caught it pulling in gas and ...

NISAR, a giant orbiting antenna 39 feet in diameter, will monitor changes to glaciers, forests, and the Earth’s crust, providing data to help improve infrastructure and disaster responses.

3I/ATLAS, an interstellar object currently zipping through the solar system, is capturing the attention of astronomers, the ...

"To do the bread-and-butter part of our job, as a scientist, the numbers that you send out have to really be well-measured, well-understood," Ajhar said. "And that takes a lot of time." Original ...