This is Io. One of the four largest moons of Jupiter. A terrifying, inhospitable world, it's got huge lakes of molten lava ...

The 2003 season saw the fewest rookies get their first call ups (182), while the 2022 season saw the most (303). On average, ...

The hours following sunset on Dec. 25 offer a wealth of naked-eye astronomy targets that can put even the most glitzy Christmas lights to shame, especially when viewed from a dark sky location.

A simple guide to the Dec. 25, 2025 night sky, with viewing tips for the moon, bright planets, and familiar winter stars ...

The year also features prime aurora viewing in January and two supermoons.

Creativity has long reigned in Swedish Lapland — where the Sámi historically used their ingenuity to survive the cold, dark ...

Santa keeps a ledger of who’s been naughty or nice. We keep something stranger: a running tally of the moments when science ...

A rare purple sea snail (Janthina) washes ashore in San Deigo. Scientists reveal its floating bubble-raft lifestyle, striking violet colour and how ocean currents unexpectedly carried it to the beach.