Venus and Jupiter are the top evening features for your observing run after sunset in May. Jupiter also hosts a handful of exciting double transits — and double shadow transits — involving Europa and ...

Like April, May opens with a Full Moon as our satellite officially reaches this phase at 1:23 P.M. EDT. The month of May also carries 2026’s first — and only — Blue Moon, with a second Full Moon ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) instruments aboard ESA's Jupiter Icy Moons Explorer ...

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

Comet C/2025 R3 (PanSTARRS) continues to brighten ahead of its closest approach to Earth on April 26, and you can watch it fly between the sun and Earth through the eyes of an orbiting spacecraft this ...

Using the Atacama Large Millimeter/submillimeter Array (ALMA), scientists have discovered that the interstellar invader comet 3I/ATLAS formed in a much colder region of the Milky Way than our solar ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Can you tell the difference between a meteor — also called a ...

An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about planetary systems ...