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

Seeing Ceres: Then and Now

Technology writer Paul Gilster shares his interest in how we depict astronomical objects, focusing on the dwarf planet Ceres.

My ever-popular asteroids-and-comets montage, now in color, with bonus Toutatis

My collage of all the asteroids and comets visited by spacecraft is probably the single most popular image I have ever posted on this blog. I've now updated it to be in color and to include Toutatis.

Door 27 in the 2010 advent calendar

Time to open the twenty-seventh door in the advent calendar. Where in the solar system is this flat-floored depression?

Boulders and Ponds on 433 Eros

There is really cool geology being explored on large, oddly shaped asteroids. The Near Earth Asteroid Rendezvous (NEAR) mission reached 433 Eros in 2000, and one of the exciting results was the discovery of features called

Planetary Society Advent Calendar for December 2: Mathilde

253 Mathilde is the largest asteroid that has ever been visited by a spacecraft. It's held that distinction for more than twelve years, but next year it'll be upstaged by the considerably larger 21 Lutetia, which Rosetta will fly by on July 10.

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

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