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And a giant balloon has been launched by NASA to test the largest parachutes ever made. Engineers hope the 30-meter diameter chutes will be used one day to bring a flying saucer-type lander safely down on the surface of Mars. Peter Bows reports from Los Angeles.
“NASA scientists had hoped the test would pave the way for astronauts eventually to land on Mars. It was designed to investigate how a large landing vehicle would slow down as it falls through the atmosphere at supersonic speeds. A helium filled balloon carried a saucer-shaped test vehicle to a height of about 37 kilometers and a built-in rocket fired it a further 50 kilometers before the parachute was meant to slow its descent, but it only partially opened, leaving the capsule to plummet into the Pacific Ocean.”
美国航天局发射一个巨大的气球来测试史上最大降落伞，工程师们希望这个30米直径的降落伞能用来帮助飞碟状的着陆器安全降落在火星表面。皮特·布思在洛杉矶报道。
“美国航天局科学家希望这次测试能为宇航员最终火星铺平道路，这个降落伞设计的初衷是了解在大气中以超音速航行的大型着陆器如何慢慢减速。一个氦气球带着碟形测试飞行器到大约37千米的高度，然后一个内置的火箭将其点燃并达到50千米的高度，然后降落伞慢慢降落，保持半打开状况，并离开舱体坠入太平洋。”
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