2.3.3 Micrometeorite Impact Craters on Skylab Experiment S 149

Abstract

During the Skylab experiment S 149 three different sets of areas were exposed. 71-5 cm 2 were facing the sun for 46 days, and 36 cm 2 for 33 days, whereas 77-5 cm 2 were exposed in anti-solar direction for 3^ days. A fourth set is currently being exposed with the hope of future recovery. The exposed surfaces consisted of stainless steel, aluminium, platinum, glass, and pyroxene. The recovered targets have been investigated with a light microscope and a scanning electron microscope. We found two groups of possible impact structures: