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

Some big moons in the Kuiper belt

In a new preprint, Mike Brown and Bryan Butler show evidence that two Kuiper belt moons are even bigger than we used to think. They are Eris' moon Dysnomia, and Orcus' moon Vanth.

Dawn Journal: 4 Billion Miles

Permanently in residence at dwarf planet Ceres, Dawn is now preparing to add some finishing touches to its mission.

Dawn Journal: Second Extended Mission

Building on the successes of its primary mission and its first extended mission, NASA has approved the veteran explorer for a second extended mission.

Dawn Journal: 10 Years in Space

A decade after leaving its first home in the solar system, Dawn is healthy and successful at its current residence around Ceres.

Dawn Journal: Still More Science

Orbiting the only dwarf planet inside the orbit of Neptune, Dawn is healthy and continuing to carry out its assignments at Ceres, which includes keeping an eye on cosmic rays.

Dawn Journal: Adaptations

On the other side of the solar system, invisible by virtue both of the blinding glare of the sun and by the vastness of the distance, Dawn is continuing its remarkable cosmic adventure.

Dawn Journal: Bonus Plans

Now in its third year of orbiting a distant dwarf planet, a spacecraft from Earth is as active as ever. Like a master artist, Dawn is working hard to add fine details to its stunning portrait of Ceres.

Dawn Journal: Intricate Maneuvers

The Dawn mission is executing an ambitious bonus goal recently devised for its extended mission. Mission Manager and Chief Engineer Marc Rayman brings us his monthly update.

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