120 seconds in Pluto’s shadow

A nerve-wracking path correction put a 747 on course to measure Pluto’s skies

SOFIA test flight

SCOPE’S ON A PLANE  A 2.5-meter-wide telescope peers through an opening on SOFIA during a 2010 test flight over the Sierra Nevada mountains in California. 

NASA

Pluto’s shadow raced across the Pacific Ocean at more than 85,000 kilometers per hour.