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Our journalists and guest bloggers bring you stunning imagery and the space stories that matter most.

Planetary Radio: Don't Step in That Puddle!

Mat Kaplan • July 01, 2013

The Planetary Science Institute's Amanda Hendrix is the guest for our July 1 episode. She finds water in the least likely places, including Luna.

Dawn Journal: Thrusting to a new personal best

Marc Rayman • June 02, 2013 • 2

Traveling from one alien world to another, Dawn is reliably powering its way through the main asteroid belt with its ion propulsion system. Vesta falls farther and farther behind as the spacecraft gently and patiently reshapes its orbit around the sun, aiming for a 2015 rendezvous with dwarf planet Ceres.

Dawn Journal: A low-orbit shortcut to Ceres

Marc Rayman • May 02, 2013

Marc Rayman's latest Dawn Journal explains why Dawn is currently closer to the Sun than both Ceres and Vesta.

Dawn Journal: Staying warm en route to Ceres

Marc Rayman • March 30, 2013 • 4

Marc Rayman's latest Dawn journal explains the temperature adjustments engineers make to save power and keep the spacecraft warm.

Dawn Journal: Revisiting orbital mechanics

Marc Rayman • March 01, 2013 • 1

Now that Dawn has changed its speed by nearly eight kilometers per second, Marc Rayman revisits the concept of orbital velocity.

Dawn Journal: Vesta's Mountains, Gorges and Craters

Marc Rayman • January 31, 2013 • 1

As Dawn continues thrusting toward Ceres, Marc takes a look back at the intrepid spacecraft's discoveries.

Dawn Journal: Faraway Viewing Through the Mind's Eye

Marc Rayman • January 02, 2013

As Dawn treks onward to Ceres, its path will cross within a few degrees of the moon as seen from Earth on Jan. 21–22.

Dawn Journal: Hydrazine Haste Makes Waste

Marc Rayman • December 05, 2012 • 1

By saving fuel, Dawn will arrive at Ceres in 2015 with about half of the 45.6-kilogram (101-pound) hydrazine supply it had when it rocketed away from Cape Canaveral.

Planetary Radio: A Dawn Mission Update

Mat Kaplan • November 20, 2012

A Planetary Radio status report from the Dawn mission's Marc Rayman, accompanied by a fascinating video tour of Marc's at-home collection of space information and memorabilia.

Dawn Journal: Scary-Good Ion Propulsion

Marc Rayman • October 31, 2012

Dawn continues to raise its orbit en route to its 2015 date with Ceres. Also, Marc prepares his high-energy Halloween costume.

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