An interstellar trespasser known as 3I/ATLAS is almost certainly a comet. So, why do so many people think it's ...

The rare interstellar comet, also known as 3I/ATLAS, was first discovered in July and has been photographed several times.

While none of the spacecraft have cameras perfectly designed to spot comets zipping by at speeds up to about 153,000 miles ...

NASA is unveiling close-up pictures of the interstellar comet that's making a quick one-and-done tour of our solar system.

Interstellar comet 3I/ATLAS has spent the last several months on a tour of our solar system. NASA spacecraft and telescopes ...

Tonight, skywatchers are in for a rare and spectacular treat as the Moon and Jupiter align in the night sky. Whether you’re ...

Using JWST, scientists mapped WASP-18b’s atmosphere in 3D, revealing blazing regions where water molecules split apart.

NEW YORK (AP) — Scientists have spotted the brightest flare yet from a supermassive black hole that shines with the light of 10 trillion suns. These bursts of light and energy can come from things ...

NEW YORK (AP) — The moon will look slightly bigger and brighter Wednesday night during the closest supermoon of the year. The moon’s orbit around the Earth isn’t a perfect circle, so it gets nearer ...

ROME (AP) — It’s not just Grand Slam titles that Jannik Sinner and Carlos Alcaraz have taken turns collecting this year. The top two tennis players are also trading the No. 1 ranking back and forth.