In June 1985 Russia Flew 2 Balloons Through the Sulfuric Acid Clouds of Venus. They Rode 150-Mile-an-Hour Winds for 46 ...
Summary and Key Points – In June 1985, the Soviet Union released 2 balloons into the clouds of Venus, which traveled 11,600 kilometers. Each envelope was 3.4 meters across, filled with helium,and built from a Teflon-family fluoropolymer chosen because …