Comets

The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.

The Jupiter-bound spacecraft JUICE spotted the interstellar invader comet 3I/ATLAS spraying enough water into space to fill 70 swimming pools a day.

A rare long-period comet is here — here's how to find comet C/2025 R3 (PanSTARRS) before sunrise this April, with key dates, viewing tips and the best mornings to look.

A dramatic breakup near the sun erased hopes of a bright comet lighting up the evening sky this week.

Our solar system's famous "invader" might be as old as the Milky Way itself.

The unprecedented observations of comet 41P/Tuttle–Giacobini–Kresák show its rotation slowing, reversing and then speeding up, and jet-like outbursts of gas might be providing the push.

NASA's Hubble Space Telescope has captured a rare cosmic moment: a comet breaking apart in real time.

The interstellar comet 3I/ATLAS is unusually rich in alcohol — a chemical clue that could reveal how planets and icy bodies form around other stars.

A newly discovered comet is rapidly brightening and could become visible from Earth — if it survives an extreme close encounter with the sun on April 4.

If launched in 2035, a spacecraft performing such a maneuver could fly by 3I/ATLAS by 2085.