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CNN 国际新闻
📌 标题：Gravity holds the universe together. A decade-long experiment has failed to pin down its numerical value
📅 发布时间：Updated May 7, 2026, 1:31 PM ET
📝 英文原文：
Scientists have announced the results of a decade-long quest to measure Newton’s gravitational constant, the force that keeps our feet on the ground and holds planets in orbit.The pursuit was more or less a bust. The most ambitious effort to date to pin down the fundamental constant, which determines the strength of the attraction between two masses anywhere in the universe, resulted in a number that disagreed with previous findings, including the results of an experiment it sought to replicate.Stephan Schlamminger, the scientist who painstakingly conducted the latest experiment that began in 2016, called it a “life-sucking” experience. “It was really kind of walking through a dark valley,” added Schlamminger, a physicist at the National Institute of Standards and Technology in Gaithersburg, Maryland.But he has since been able to put a positive spin on his endeavors. “Now, I’ve put it a little bit in my rearview mirror,” he said. “I think every measurement is an opportunity to learn and every measurement brings light into this darkness.”What is the gravitational constant?Fundamental constants of nature are key values that define the behavior ofphysical phenomena in the universe— and they don’t change regardless of where you are in time or space. They include the speed of light and Planck’s constant, which plays akey role in quantum physics.These constants are “baked into the fabric of the universe,” Schlamminger said. “It’s quite beautiful, because they are the same over generations. If you ever talked to an extraterrestrial, they would have the same concept.”For more than 225 years, scientists have tried to measure the gravitational constant, nicknamed Big G. British scientist Henry Cavendish performed the first experiment to measure it in1798, more thana 100 years after Isaac Newton first discovered the force of gravity.Scientists have not, however, been able to converge on a measurement with a level of precision comparable to that of constants such as the speed o
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🇨🇳 中文翻译：
科学家们宣布了长达十年的测量牛顿引力常数的研究结果，牛顿引力常数是使我们的脚保持在地面上并将行星保持在轨道上的力。这项研究或多或少是半途而废。迄今为止，为确定基本常数（决定宇宙中任何地方的两个质量之间的吸引力的强度）而进行的最雄心勃勃的努力，导致了一些与之前的发现不一致的结果，包括它试图复制的实验结果。
🔗 原文链接：阅读全文
本文由自动抓取系统生成，英文原文已自动翻译为中文。 |
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