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

What the Shoemaker-Levy 9 Impact Taught Us

Twenty-five years ago, multiple fragments of comet Shoemaker-Levy 9 crashed into Jupiter, changing the face of the planet and the course of planetary science.

A Note on the State of Planetary Science

Heidi Hammel, the Chair of the American Astronomical Society's Division for Planetary Science, reacts to the recent budget news and the uncertain future for planetary science at NASA.

What We Know About the Russian Meteor Event [UPDATED]

Preliminary estimates show that the meteoroid was 15 meters wide and weighed roughly 8000 tons. The resulting airburst would have the equivalent yield of about a 1/2 megaton explosion.

Following up the dark spot on Uranus

It was a surprise and delight to have our Icarus paper highlighted in Emily Lakdawalla's blog. Thanks for highlighting Uranus, since it has gotten, ahem, a bum rap over the years. Here's more about our discovery of the dark spot on Uranus.

Space is vast. There's a lot of exploring to do.

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