Astronomers have long struggled with a troubling puzzle: a significant portion of normal matter in the universe appeared to ...

One of the most spectacular galaxies in Earth's sky is the subject of a new image release to help celebrate 35 years of ...

In a landmark discovery, astronomers have confirmed the existence of a solitary stellar-mass black hole—an object with ...

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...

A blob of gas seen outside the Milky Way could be a type of starless, dark matter–dominated galaxy. Some scientists are skeptical.

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

Astronomers are applying new image-processing techniques to previously released Hubble observations in honor of the space ...

Hubble’s 35‑year celebration brings a vibrant reimagining of the Sombrero Galaxy, revealing hidden dust lanes and far‑flung ...

"We've always known that we need something to complete the puzzle, but we haven't really known what shape or form those ...

As part of ESA/Hubble's 35th anniversary celebrations, the European Space Agency (ESA) is sharing a new image series ...

A newly released image from the Hubble Space Telescope shows the charming Sombrero Galaxy, named for its resemblance to the ...

Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...