When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that same hunk of ice starts blasting out enough water to fill 70 Olympic swimming ...

When comet 3I/ATLAS swept past the Sun in late October 2025, it gave astronomers their best chance yet to taste the chemistry ...

The Subaru Telescope achieved first light in January 1999 and entered its 27th year of operation in 2026. In March 2025, ...

STARRS, also known as comet C/2025 R3 (Pan-STARRS), is visible before sunrise until this weekend. Here’s how, when and where to find it on Friday, April 17.

3I/ATLAS is now sailing away from Earth and our solar system itself, but astronomers have already learned a wealth of ...

Rare interstellar comet 3I/ATLAS is revealing clues about the early Milky Way, offering scientists a glimpse into conditions ...

The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

A rare comet, formally known as C/2025 R3 PanSTARRS, is dazzling New Zealand skies before vanishing for an estimated 170,000 ...

- Lagoon Nebula (M8) is an emission nebula in Sagittarius.