While solitary black holes should be common, they are hard to find. The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly ...

Hubble’s 35‑year celebration brings a vibrant reimagining of the Sombrero Galaxy, revealing hidden dust lanes and far‑flung stars. This iconic “Mexican hat” quietly forms almost no new stars while ...

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

This advertisement has not loaded yet, but your article continues below. For the first time in eight years, the Ottawa Senators are in the playoffs — and what better way to return than in a ...

A recent astronomical discovery is revolutionizing our understanding of spiral galaxies. A giant spiral galaxy, located ...

The quasi-periodic eruptions of X-rays from a black hole 300 million light-years away are unlike any researchers have ever ...

A distant galaxy that lay quiet for decades has suddenly stirred, lighting up in dramatic bursts that have caught astronomers ...

Astronomers using W. M. Keck Observatory on Maunakea, Hawaiʻi Island have found compelling evidence of a dark matter-deficient dwarf galaxy, FCC 224. This ultra-diffuse galaxy is located on the ...

Einstein believed that black holes didn't really exist. But they do: that much we know. We don't know much else about them.