您现在的位置: 首页 > 英语听力 > 媒体资讯 > 60秒科学 > 正文

60秒科学:地球周围发现时空漩涡,爱因斯坦预言得到证实

时间:2011-05-10 11:41:01 来源:scientificamerican 编辑:sunny  每天三分钟英语轻松学

据美国宇航局网站报道,爱因斯坦的预言再一次得到了证实!科学家们经过仔细的检测,发现地球周围确实存在时空漩涡,并且其各项参数和爱因斯坦广义相对论预言的完全符合。

Albert Einstein wins again. A new study has confirmed another prediction of his theory of general relativity. The corroboration appears online in the journal Physical Review Letters. [Francis Everitt et al., citation to come.]

Einstein’s theory recognizes that massive objects warp the very fabric of space and time. If the theory is true, then the Earth should stretch the spacetime in which it sits, like a bowling ball would deform a trampoline. What’s more, the Earth’s rotation should also produce a drag on local spacetime, like a marble spinning in molasses would pull the goop around it.

To measure these minor deformations, scientists sent four gyroscopes into space in a mission called Gravity Probe B. And they found that after circling the Earth some 5000 times the gyroscopes’ angle of spin had changed, ever-so-slightly, in response to the Earth’s gravitational pull. Which proves that the old man was right.

Gravity Probe B was first conceived in 1959. [1976 paper envisioning the experimental setup] And the technology created to make the mission fly has been applied in work on the big bang theory—the real theory, not the TV show—and in GPS. Which Einstein would have loved. Because even a genius can get lost on the highway.

—Karen Hopkin

收藏

相关热词搜索: 60秒科学

上一篇:爱尔兰留学延续签证注意事项

下一篇:新加坡私立大学 新加坡亚奥教育集团

您可能还感兴趣的文章

60秒科学:墨西哥薄饼:就餐者常忽略其中的卡路里
听力练习墨西哥风格的快餐连锁店公布其饮食中的卡路里后,就餐者的点餐风格依然未变。Karen 凯伦·霍普金报道We Americans love our fast food. And a new study shows t

时间:2011-01-19 编辑:sunny

60秒科学:电子邮件传谣比博客和网页更厉害
听力练习通过电子邮件传递关于政治候选人的流言蜚语比网页和博客更加容易取信于人。During the 2008 presidential election, the Internet became a giant rumor mill. F

时间:2011-03-15 编辑:sunny

60秒科学:大象能负重的原因
听力文本大多数四条腿动物用后腿前进,前腿停步,而研究表明,大象用四条腿来加速和“刹车”。Elephants. They’re the SUVs of the animal kingdom. They’re big and r

时间:2010-03-31 编辑:sunny

60秒科学:卡路里可以目测吗?
听力练习Subjects varied their estimates of the calorie content of a food depending on the assumed negative or positive healthful qualities of the food item th

时间:2010-09-26 编辑:keke

最新文章

无觅相关文章插件,快速提升流量