The universe

Over the last 25 years, black hole physics has experienced something of a revolution.

Physicists have struggled to understand the nature of time since the field began. But a new theoretical study suggests time could be an illusion woven at the quantum level.

Newly released images from NASA's Chandra X-ray telescope capture a cloud complex called Rho Ophiuchi, the Orion Nebula, a spiral galaxy named NGC 3627 and a galaxy cluster known as MACS J0416.

Sunspot region AR 3738 fired off an X1.9 flare as it exited the sun's western limb on July 16, 2024 and caused radio blackouts over much of Africa, Europe, and parts of North and South America.

As Apophis passes closer to Earth than geosynchronous satellites in April 2029, the asteroid will hopefully be tracked by a new ESA mission called Ramses.

It's been a long ride for exoplanet science — and for Space.com itself.

A newly proposed mass-based definition of a planet reaffirms Pluto as a dwarf planet.

How social media has changed the way we get information this century.

Watch a powerful X-class solar flare erupt from the sun's surface on July 13 and find out how it affected Earth.

The composition and great density of 'hot Saturn' exoplanet Smertrios are a challenge to planet formation models that the detection of water may help solve.