NASA. Exceptional photograph of asteroids... - Lot 179 - Vermot et Associés

Lot 179
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600 - 800 EUR
NASA. Exceptional photograph of asteroids... - Lot 179 - Vermot et Associés
NASA. Exceptional photograph of asteroids IDA (left) and GASPRA (right) at the same scale. These images were taken by the Galileo spacecraft on its way to Jupiter. Gaspra was imaged on October 29, 1991 at a distance of 5300 km. Ida was imaged on August 28, 1993 at a distance of 3,000 to 3,800 km. Both objects are irregularly shaped. Gaspra is about 17 km long, and Ida measures 9.3 x 12.7 x 29.9 km. These asteroids are just two of billions of rocky, metallic objects that orbit the sun, mostly between Mars and Jupiter. A small percentage orbit near other planets. The irregular shapes of these objects suggest that they are "chips" derived from larger bodies by catastrophic collisions between asteroids. The surface of Ida and Gaspra is dotted with small craters, evidence of much smaller collisions. Craters are more abundant on Ida, suggesting that it formed earlier than Gaspra. Period chromogenic print. Legend on label on the back. 40,6 X 40,6CM with margins.
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