Our time with our interstellar visitor, comet 3I/ATLAS, is almost up. It’s set to leave the solar system soon, after zipping ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

Comet C/2025 R3 is already drawing attention—and offers a rare chance to understand what separates an ordinary comet from a ...

For months, all eyes in the sky have pointed at the comet that’s zooming toward a blisteringly close encounter with the sun. The moment of truth comes Thursday — Thanksgiving Day. The sun-grazing ...

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Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

Comet C/2025 R3 is putting on its final show as it passes close to the Sun before leaving the solar system forever.

Right now may be the best to try to view it. It’s located in the constellation Pegasus about 90 minutes before sunrise.

The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its ...

STARRS, also known as comet C/2025 R3 (Pan-STARRS), is now visible before sunrise. Here’s how, when and where to find it on Monday, April 13.

STARRS, also known as comet C/2025 R3 (Pan-STARRS), just got closest to the sun and should still be visible from the Northern ...