In 1066, an elderly Benedictine monk stood in the grounds of Malmesbury Abbey in southwestern England and watched a bright, ...
Halley’s Comet naming controversy is reshaping astronomy history after new medieval research revealed a forgotten discovery ...
A medieval monk may have beaten Edmond Halley to one of astronomy’s greatest discoveries by nearly 700 years. Researchers say ...
The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) instruments aboard ESA's Jupiter Icy Moons Explorer ...
The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its closest approach.
Comet C/2025 R3 (PanSTARRS) is brightening in the night sky in April. Here's when and how to see the buzzworthy celestial show.
A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...
The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...
A rare comet from another star system is revealing just how different alien solar systems may be from our own.
Looking for a sky event this week? Check out our full Sky This Week column. May 9: Look the croc in the eye Although still ...
Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A brightening comet is becoming easier to see before sunrise ...
An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about ...