A dazzling snapshot from ESO’s Paranal Observatory captures a rare sky parade — the Moon, a comet, and nearly every visible planet strung across the heavens. This celestial lineup is an optical ...

Perhaps the best known of all comets is Halley, correctly pronounced so that it rhymes with rally, not daily. It is named after the 17th-18th century astronomer Edmond Halley. This ...

"The extent of the tail is gargantuan, stretching up to 9 million kilometers [5.6 million miles] long," said MIT astronomer ...

This week is International Dark Sky Week. Lights that are aimed upwards or not properly capped illuminate the atmosphere and ...

Enjoy dark skies for evening observing, then catch a meteor shower and a planetary conjunction in the morning sky this week.

Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they remain cautious.

Discovered in March of this year, Comet Swan (C/2025 F2) is visible low in the pre-dawn northeast sky, before moving to the ...

The 2025 comet class sailing season commenced in St. George’s Harbour with the Allan Frith Regatta. Maxwell Curtis and Wesley Tucker, the reigning 2024 fleet and winter series champions ...

Meet comet C/2025 F2 (SWAN): a celestial body glowing green as it swings around the sun, currently visible in the early morning hours with backyard gear, such as small telescopes or binoculars.

A freshly-discovered comet has lots of skywatchers training their telescopes on the dawn sky, but pretty soon the new Comet SWAN25F will flip to our evening sky, and allow a lot of us to get a ...

Tonight's Lunar Eclipse and Full 'Blood Worm Moon' Is Visible From Every U.S. State—and It'll Make the Moon Red See the Year’s Brightest Comet, a Supermoon, and 2 Meteor Showers in October's ...

SWAN25F is a newly discovered comet that is streaking through the sky this month. It was only just identified in March of this year by amateurs, but it’s already getting brighter and putting on ...