New Horizons probe wakes up for post-Pluto flyby

Ultima Thule and New Horizons
An artist’s conception shows Ultima Thule with the New Horizons probe silhouetted by the sun. (NASA / JHUAPL / SwRI Illustration)

The mission operations team for NASA’s New Horizons probe has awakened the spacecraft from its robotic hibernation, and now it’ll stay awake for its scheduled Jan. 1 flyby of a mysterious object on the solar system’s edge, known as 2014 MU69 or Ultima Thule.

New Horizons has been traveling toward Ultima Thule since its history-making Pluto flyby in 2015. To save on resources, the piano-sized probe has been in hibernation mode since last Dec. 21.

The radio signals confirming New Horizons’ latest wakeup call took more than five and a half hours to flash at the speed of light from the solar system’s frontier to NASA’s Deep Space Network, and onward to mission control at Johns Hopkins University’s Applied Physics Laboratory in Maryland. The good news finally arrived at 2:12 a.m. ET today (11:12 p.m. PT June 4).

Get the full story on GeekWire.

By Alan Boyle

Mastermind of Cosmic Log, contributing editor at GeekWire, author of "The Case for Pluto: How a Little Planet Made a Big Difference," president of the Council for the Advancement of Science Writing. Check out "About Alan Boyle" for more fun facts.

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