There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

The universe got its start billions of years ago in the Big Bang. Since then, it has been continuously expanding. These concepts are generally accepted by virtually all scientists. The question, ...

New observations from the James Webb Space Telescope suggest that a new feature in the universe—not a flaw in telescope measurements—may be behind the decadelong mystery of why the universe is ...

A cosmic zoom-out shows the vast scale of the universe, highlighting billions of galaxies and raising the question of whether ...

The universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous—and highly debated—results had shown: The universe is expanding faster than predicted by ...

Banner image: Artist's depiction of the New Horizons spacecraft billions of miles from Earth. (Credit: NASA, APL, SwRI, Serge Brunier/ESO, Marc Postman/STScI, Dan Durda) Scientists have traveled to ...

The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous -- and highly debated -- results had shown: The Universe is expanding faster than predicted by ...

Earth and the entire Milky Way galaxy might be sitting inside an enormous, mysterious void—a giant cosmic hole making our universe expand faster right here than anywhere else. This unusual idea, ...