The gravitational wave observatory has detected a second event, heralding a new era in astrophysics.
Astronomers may have solved the case of the Milky Way’s missing satellite galaxies. The solution? The galaxies never existed.
Comet 67P/Churyumov-Gerasimenko appears to have split into two segments that briefly orbited each other and then slowly merged into a new configuration.
Astronomers have detected three cold gas clumps falling toward a galaxy’s center – at odds with the prevailing idea for how black holes grow.
Astronomers have new radio images of Jupiter that allow them to see deep into its atmosphere.
The Moon, Mars, and Saturn make a wide, flattish triangle tonight, and the full Moon arrives on Sunday.
Celebrate the June 20th solstice, when the Sun and the full Strawberry Moon combine their powers to illuminate both day and night.
Sky & Telescope’s astronomy podcast takes you on a guided tour of the night sky. After the Sun sinks from view, enjoy watching Mars and Saturn near Scorpius in the southeast and Jupiter near Leo well up in the southwest.
The winners of the 7th annual Earth & Sky Photo Contest highlight the fragile beauty of the heavens.
Light pollution is pervasive, and its impact on people is larger than you might think.