Space

A bizarre ‘ultraluminous X-ray source’ shines millions of times brighter than the sun, breaking a physical law called the Eddington limit, a new study finds.

Using machine learning, researchers have sharpened the Event Horizon Telescope’s iconic view of the black hole lurking at the heart of galaxy M87

The liftoff of Europe’s first mission to Jupiter aboard an Ariane 5 rocket was scrubbed Thursday in French Guiana due to a high risk of lightning at the launch site, delaying until Friday the start of the JUICE spacecraft’s voyager of exploration.

Life within extraterrestrial oceans may not only be possible, it might be flourishing.

SpaceX shared stunning new photos of its Starship vehicle, ready for launch on the company’s Starbase facility in South Texas on April 12, with the sun rising in the background.

The launch of a Japanese X-ray telescope and robotic lunar lander has been delayed to no earlier than August, and the launch schedule for another Japanese mission to return samples from a moon of Mars is in doubt as engineers investigate the failure of Japan’s first H3 rocket last month.

Europa, Ganymede, and Callisto harbor potential subsurface oceans — and life. Soon, JUICE will show them as never before.

A newfound asteroid called 2023 FW13 has been Earth’s companion for centuries, astronomers say.

Local Group member Leo 1 is a dwarf spheroidal galaxy that’s a distant satellite of our own Milky Way Galaxy. It’s one of a number of observing challenges that Leo offers up, though it presents unique difficulties.

Some scientists think they’ve found the signature of a supernova buried in the afterglow of the brightest gamma-ray burst (GRB) ever observed. Others aren’t so sure.