The image of supermassive black hole Sagittarius A * was created using data from the Event Horizon Telescope Collaboration.

The bold question-askers at What If venture beyond the event horizon to speculate what could lie inside a black hole.

Imagine if a species grew up on a planet that had a black hole moon the mass of the moon. They’d have tides, they’d have an unobstructed view of the night sky, and they’d have no clue about this ...

With the recent first light milestone for the Vera Rubin Observatory, it's only a matter of time before one of astronomy's most long-awaited surveys begins. The Legacy Survey of Space and Time (LSST) ...

We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

The powerful merger, designated GW231123, produced an extremely large black hole about 225 times the mass of our Sun.

A puzzling gravitational wave was detected, and astronomers have determined that it comes from a record-breaking black hole ...

But in the past two decades, new types of black holes have been seen and astronomers are beginning to understand how they ...

Collaboration has detected the merger of the most massive black holes ever observed with gravitational waves using the LIGO ...

Gravitational waves spotted by LIGO reveal two black holes, 140 and 100 times the mass of the sun, merged to become a 225 solar mass behemoth.

In summer, we face toward the Milky Way's hub in the Teapot constellation, home to the galaxy's supermassive black hole.

The buck moon is the first full moon in July and will be one of the most clearly visible lunar events of the year.