Photo of the Day 30 August 2007

Albuquerque, New Mexico, 1978
Photograph by Otis Imboden
Inventor and balloonist Frederick Eshoo drifts over Albuquerque, New Mexico, in his invention, Sunstat, the first maneuverable solar hot-air balloon.

The balloon's clear panels (left) transmit sunlight to heat-absorbing opaque panels opposite, heating the air inside and keeping the balloon aloft. At more than four hours and 12,500 feet (3,800 meters), Eshoo’s first trip was a soaring success.