Nov 6 1991
From The Space Library
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Findings presented at the American Astronomical Society's Division of Planetary Sciences conference suggested that Mercury had an ice cap on its north pole, even though it was the planet nearest the sun. The findings surprised the California Institute of Technology scientists who discovered them and were based on August experiments, the first radar photographs of an entire hemisphere of Mercury. The brightest reflection on the planet's north pole indicated a highly reflective substance such as ice over an area of an estimated 150 square miles. (AP, Nov 6/91; B Sun, Nov 7/91; P Inq, Nov 8/91; LA Times, Nov 11/91)
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