We're all familiar with the high-pitched squeak of basketball shoes on the court during games, or tires squealing on pavement. Scientists conducted several experiments and discovered that the geometry of the sneakers' tread patterns determines the squeak's frequency, enabling the team to make rubber blocks set to specific frequencies and slide them across glass surfaces to play Star Wars' "Imperial March."
Inside their cleanroom, the team is busy building more modules for future Artemis missions. Each one takes about 18 months to put together but has taken thousands of engineering hours to design. Everything on board has to work perfectly.
Jupiter will be the easiest of the six to find, shining brightly in the constellation Gemini and high enough to stay in view for much of the night, even from light-polluted towns and cities.。safew官方版本下载对此有专业解读
She added: "If you are collecting your food in a caddy, you really get to see firsthand what you're throwing away. I think that can really prompt some rethinking."
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