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| insignia = Pioneer 10 - Pioneer 11 - mission patch - Pioneer patch.png | insignia_caption = | insignia_alt = | insignia_size = 150 }} ''Pioneer 11'' (also known as ''Pioneer G'') is a 259 kilogram (569 lb) robotic space probe launched by NASA on April 6, 1973 to study the asteroid belt, the environment around Jupiter and Saturn, solar wind, cosmic rays, and eventually the far reaches of the Solar System and heliosphere.〔 It was the first probe to encounter Saturn and the second to fly through the asteroid belt and by Jupiter. Due to power constraints and the vast distance to the probe, last contact with the spacecraft was on September 30, 1995.〔http://www.nasa.gov/centers/ames/missions/archive/pioneer.html〕 ==Mission background== 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Pioneer 11」の詳細全文を読む スポンサード リンク
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