Does Saturn's Death Star moon have an ocean under its surface?

Mimas is small, but may contain watery secrets.

By Phil Plait 29 sec ago

Another candidate exomoon found: An alien moon orbiting an alien world!

If it exists the moon is far larger than Earth.

By Phil Plait 40 sec ago

A thousand-light-year-wide bubble around the Sun was blown by the ghosts of long-dead stars

Local Bubble carved by supernova beginning 14 million years ago.

By Phil Plait 21 hours ago

CHEOPS reveals WASP-103b: An egg-shaped planet that's definitely hard boiled

WASP-103b is cooked and distorted by its host star.

By Phil Plait 1 day ago

Antimatter and matter fall at the same rate. Well, within 3%.

Antimatter is just like matter where it matters.

By Phil Plait 2 days ago

James Webb Space Telescope is now fully deployed! But there's still a long way to go.

The major components have unfolded and are ready to be tested.

By Phil Plait 3 days ago

Solar UV radiation on Earth's surface may have been more intense eons ago than we thought

New models show Earth had less oxygen and therefore less ozone billions of years ago.

By Phil Plait 6 days ago

Cool: The galaxy's oldest globular cluster has been found. Cooler: Our galaxy is eating it.

Extremely ancient star cluster torn apart by the Milky Way.

By Phil Plait 1 week ago

Non-baryonic mystery: Where is this galaxy's dark matter?

A faint diffuse galaxy is missing its dark matter.

By Phil Plait 1 week ago

A weird blob that survived a close pass with a huge black hole is actually three stars enshrouded in dust

G2 isn't one dust cloud, it's three, each with an embedded star.

By Phil Plait 1 week ago