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Dawn Journal: Craving Power

Marc Rayman • July 30, 2013 • 5

Ion propulsion is not a source of power for Dawn. Rather, the craft needs a great deal of power to operate its ion propulsion system and all other systems. It needs so much that...we crave power!!

Terra Cognita

Bill Dunford • July 29, 2013 • 4

Pushing back the frontier, and filling in the blank spaces on the map.

Dawn Journal: Breaking Velocity Records

Marc Rayman • July 02, 2013 • 7

The indefatigable Dawn spacecraft is continuing its extraordinary interplanetary flight on behalf of inquisitive creatures on distant Earth. Progressing ever farther from Vesta, the rocky and rugged world it so recently explored, the ship is making good progress toward its second port of call, dwarf planet Ceres.

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.

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