The biggest comet ever seen shows off its hair for Hubble

UN271 is ~137 km across, bigger than any other object like it ever seen.

By Phil Plait 1 month ago

Dwarf planets can have rings, too, if they're lumpy or oblate

By Phil Plait 8 months ago

Want to find Planet Nine? Here's a treasure map.

By Phil Plait 9 months ago

Don’t panic! But a gigantic comet is currently inbound toward the Sun

By Phil Plait 11 months ago

New analysis weakens — but doesn't kill — the case for Planet Nine (UPDATED)

By Phil Plait 1 year ago

Has the Sun captured dozens of asteroids from another star? Wellll…

By Phil Plait 2 years ago

Neptune's back yard just got 316 new residents

By Phil Plait 2 years ago

Help astronomers name a Trans-Neptunian Object! (225088) 2007 OR10 just doesn't cut it

By Phil Plait 3 years ago

Here it is: The most detailed full image of MU69 from New Horizons we'll ever see.

By Phil Plait 3 years ago

Does Planet 9 Exist? <All signs (still) point to 'yes'>

By Phil Plait 3 years ago