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Density Can't Keep Saturn's Rings Old

Saturn's B ring is much less dense than previously thought, challenging attempts to keep it billions of years old.

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.

Saturn Surprises

Cassini keeps revealing puzzling phenomena in the Saturn system that challenge traditional theories and date estimates.

Saturn Rescues Earth: Outer Planet Wonders

How Saturn saved the Earth, and other news from the ringed planet, its family, and other bodies in the outer solar system.

Mercury, Moon May Still Be Erupting

Two objects that should be old and dead show surprising activity. Other indications of youthfulness in the solar system are noted.

Of Planets and People

Here's a quick tour of the planets to see what's newsworthy.

Are Saturn’s Rings Evolving?

Can ring particles grow into moons? And is that how planets grew from rings around stars?
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