A 2017 astronaut photo shows the islands of Dek and Daga lurking in the murky, algae-infested waters of Ethiopia's Lake Tana.

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that ...

A newly discovered comet is about to make its closest pass to Earth on Tuesday night. It should be visible over the Bay Area ...

Comet Lemmon is being called the 'best and brightest' comet of the year with its distict green color, and it's not the only ...

A rare, green-glowing comet will make its closest approach to Earth next week — and it won’t return for more than a thousand ...

Though it won't become any brighter, Comet SWAN will reach its closest point to Earth on Oct. 20, coming within 24 million miles. It is visible in the western sky after sunset, but binoculars or a ...

Comet Lemmon (C/2025 A4) will make its closest approach to Earth on November 8th, and is currently visible to the naked eye ...

For those of you who like interesting night sky phenomena, there are actually two comets that are visible right now. Comet ...

Two comets, C/2025 A4 (Lemmon) and C/2025 R2 (SWAN), are about to reach their closest approach to Earth and you can watch the ...

Two bright green comets are streaming through the skies and are visible to skygazers in the Northern Hemisphere. Both hail ...

The comet will continue to brighten after that, likely reaching its brightest around October 31 or November 1, at which point ...

Several bats glow bright green under ultraviolet light. The glow could reveal clues about evolution in these mysterious night ...