Astronomy

A new image from the Gemini Observatory might show a stellar companion to Betelgeuse, but the discovery is tentative.

The post Betelgeuse's Companion Has Been Found — Or Has It? appeared first on Sky & Telescope.

Record heat in 2024 caused ecosystems on land to emit nearly as much carbon dioxide as they took out of the atmosphere

Record heat in 2024 caused ecosystems on land to emit nearly as much carbon dioxide as they took out of the atmosphere

Senegal has officially joined the Artemis Accords, becoming the 56th nation — and the fourth African country — to commit to a shared vision for peaceful and transparent space exploration.

Week in images: 21-25 July 2025

Discover our week through the lens

NASA currently leads the nation's planetary defense efforts, but some are calling for the Space Force to take control.

We can understand how Earth formed by watching other planets form in distant solar systems. Powerful telescopes like the VLT are making that possible. New observations show a baby planet sculpting patterns in the gas and dust around its star.

It is true that crewed missions to the Moon are expensive, difficult, and dangerous.

Stars uncontaminated by heavier elements are thought to have formed very early in the universe, but a galaxy much later in cosmic history might let us see them for the first time

Stars uncontaminated by heavier elements are thought to have formed very early in the universe, but a galaxy much later in cosmic history might let us see them for the first time

Think: subzero temperatures, bone-rattling storms and mysteries about the future of our planet under the ice.

The newly waxing Moon passes Mars low in the west, then Spica and Antares while growing more robust. At dawn, Jupiter heads toward Venus.

The post This Week's Sky at a Glance, July 25 – August 3 appeared first on Sky & Telescope.

The sixth object in

Image: The turquoise waters southeast of the Kuwaiti island of Failaka are captured in this image acquired by the Φsat-2 mission.

Hulk Hogan, a larger-than-life wrestler known for his showmanship, succumbed to cardiac arrest after a career marked by digital hoaxes and a landmark battle against online exploitation

A controversial arsenic microbe study unveiled 15 years ago has been retracted. The study’s authors are crying foul