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Geological Processes Can Be Rapid

For those trained to think in millions of years, these geological processes should sound surprising.

Europa May Be Another Geyser Moon

A re-assessment of data from the Galileo spacecraft appears to confirm suspected eruptions from the surface of Europa, Jupiter's icy moon.

Pluto and Ceres: Young Dwarf Planets

With all its data downloaded, New Horizons continues to surprise astronomers with evidence of active geology and youth at Pluto.

Activity on Planets Suggests Youth

Can these processes really have gone on for billions of years?

Underground Oceans Can't Last Forever

If Pluto and Enceladus have oceans under the crust, why are they still liquid after billions of years?

Surprising Youth in the Solar System

Four solar system objects in the news look young, not billions of years old.

Updates from Outer Planets

Let's review some of the latest news from missions to the outer planets.

Cassini Plunges Through Enceladus Geyser, and Other Saturn News

Yesterday's daring plunge through a plume of an Enceladus geyser is the highlight of recent Saturn news.

New Pluto Images Even More Perplexing

Pluto has terrain like no other world, leaving scientists perplexed; Enceladus' activity is also inexplicable for "geologic time".

Is Pluto Another Geyser World? "Shocking" Images Baffle Scientists

In addition to featureless plains, Pluto may even sport active geysers—with no recourse to tidal heating to power them.

It's Curtains for Enceladus

The geysers of Saturn's little moon are like sheets instead of jets, spelling trouble for theories of its ancient age and possible life.

Water Worlds Tempt with Life, Not Youth

More and more planets and moons are suspected of having liquid water, but what should be the logical implications?

Lunar Impact: Major Moon Basin Was Not a Big Hit

The theory of how the largest impact basin on the moon was formed has been turned upside down.
Triton Neptune montage

Active Moon Triton Revisited

25 years ago today, Voyager 2 flew by Triton, a moon of Neptune, astonishing scientists with its active geology.

Enceladus Geysers Still Unexplained

The number of geysers has topped a hundred on Saturn's overactive moon. How could they be sustained for billions of years?
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