On July 1, 2025, the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey telescope, located in northern Chile, ...

"The consequences, should the hypothesis turn out to be correct, could potentially be dire for humanity," said Avi Loeb.

Most comets, including the well-known Halley's, loop through our solar system like cosmic time capsules that formed alongside ...

Loeb points to several unusual traits that set 3I/ATLAS apart from typical comets. "The retrograde orbital plane of 3I/ATLAS ...

Discover the rare interstellar comet 3i/Atlas, recently confirmed by NASA in July 2025. Learn what makes interstellar comets unique visitors from other star systems, their composition, and their ...

You have just a few weeks left to view the "comet of the century" making its 80,000-year orbit around Earth. Comet C/2023 A3 Tsuchinshan–ATLAS will be visible with the naked eye from Earth until ...

In the days following the comet's discovery, astronomers worked out its orbit—and it turned out to be a "sun-skirter" that would pass less than 14 million kilometers from our star on January 13.

A newly discovered comet, 3I/ATLAS, may be the most ancient visitor ever detected, potentially older than our solar system ...

Instead, all the planets—and even the Sun—circle around a shared center of mass, ... One simulation compared two comets—one with a 250-year orbit and one with a 4,000-year orbit.

Comets, planets, and moons, and more intricately dance around our solar system. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Search for: ...

Perseids are known for their bright fireballs and plentiful meteors. The show started on July 17, and will run through Aug.