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Stories, updates, insights, and original analysis from The Planetary Society.

Solar System History 101

How did our solar system come to be? Why are the planets, asteroids, comets, and other small worlds where they are now?

The Next 10 Years

Six scientists share the major planetary science discoveries of the past decade, and the questions that will drive the next 10 years of solar system exploration.

NASA Then & Now

A collection of before and after slider images showing how views of planets in our solar system have changed over the years since NASA was created.

How long is a day on Saturn?

One of the Cassini mission's goals was to figure out how long a day on Saturn is. We still don't know. A new paper reports a measurement of the rotation period of Saturn that is different from past measurements.

A new storm on Saturn!

On March 29, vigilant astronomer Maciel Bassani Sparrenberger discovered that a new bright spot had broken out in Saturn's high northern latitudes.

Cassini: The dying of the light

Cassini is no more. At 10:31 according to its own clock, its thrusters could no longer hold its radio antenna pointed at Earth, and it turned away. A minute later, it vaporized in Saturn’s atmosphere. Its atoms are part of Saturn now.

Saturn and Titan in the Milky Way

An unusual photo of Saturn by astrophotographer Damian Peach shows the planet and its largest moon nestled among the star-filled lane of the Milky Way.

Trusty Cassini survives first dive between Saturn and its rings

Cheers erupted in the Von Karman auditorium at the Jet Propulsion Laboratory early Thursday morning as a squiggly green line on a graph developed a crisp, tall peak, signifying that the Cassini spacecraft was calling home after surviving its first plunge between Saturn and its ring system.

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