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Dawn Journal

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.

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.

Dawn Journal: Five years since launch

Marc Rayman • September 27, 2012 • 2

On the fifth anniversary of its launch, Dawn is on the way to Ceres.

Dawn Journal: Back to interplanetary space

Marc Rayman • September 06, 2012

After more than a year in orbit, Dawn has left Vesta, beginning the spacecraft's journey to Ceres.

Dawn Journal: The long, slow goodbye

Marc Rayman • July 26, 2012 • 1

Dawn has completed the final intensive phase of its exploration of Vesta, and it has now begun its gradual departure for Ceres.

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