英语科普小知识 寻找行星的新方法

海量资料下载 免费学习英语 www.englishvip.com/xinlw.htm （申请网址） Detecting alien worlds presents a significant challenge since they are small, faint（模糊的）, and close to their stars. The two most prolific（丰富的） techniques for finding exoplanets are radial velocity (looking for wobbling摇晃的 stars) and transits (looking for dimming stars). A team at Tel Aviv University and the Harvard-Smithsonian Center for Astrophysics (CfA) has just discovered an exoplanet using a new method that relies on Einstein's special theory of relativity. "We are looking for very subtle effects. We needed high quality measurements of stellar brightnesses, accurate to a few parts per million," said team member David Latham of the CfA.   "This was only possible because of the exquisite（精致的，细腻的） data NASA is collecting with the Kepler spacecraft," added lead author Simchon Faigler of Tel Aviv University, Israel.   Although Kepler was designed to find transiting planets, this planet was not identified using the transit method. Instead, it was discovered using a technique first proposed by Avi Loeb of the CfA and his colleague Scott Gaudi (now at Ohio State University) in 2003. (Coincidentally, they developed their theory while visiting the Institute for Advanced Study in Princeton, where Einstein once worked.)   The new method looks for three small effects that occur simultaneously as a planet orbits the star. Einstein's "beaming" effect causes the star to brighten as it moves toward us, tugged by the planet, and dim as it moves away. The brightening results from photons "piling up" in energy, as well as light getting focused in the direction of the star's motion due to relativistic effects.   "This is the first time that this aspect of Einstein's theory of relativity has been used to discover a planet," said co-author Tsevi Mazeh of Tel Aviv University. 检测外星世界提出了一个重大的挑战，因为他们是小，昏（模糊的），接近其恒星。这两个最丰富（丰富的）技术寻找系外行星的径向速度（期待摇晃摇晃的明星）和过境（调光星）。特拉维夫大学和哈佛-史密森天体物理中心（CfA）的一个团队在刚刚发现的系外行星，采用了全新的方法，它依赖于爱因斯坦的狭义相对论。“我们正在寻找非常微妙的影响，我们需要高品质测量恒星亮度，精确到百万分之几，说：”小组成员大卫·莱瑟姆终审法院。   “这是唯一可能的，因为精致（精致的，细腻的）数据美国宇航局开普勒飞船收集，补充说：“铅的作者Simchon Faigler，以色列特拉维夫大学。   虽然开普勒找到过境星球，这个星球上没有被识别利用过境的方法。相反，它被发现使用的技术由终审法院AVI勒布和他的同事斯科特·高迪（现在在俄亥俄州立大学）在2003年首先提出的。（巧合的是，他们开发他们的理论，而来访的普林斯顿，爱因斯坦曾经工作过的高级研究学院）。   三个小的影响，同时出现一颗行星绕恒星的新方法寻找。爱因斯坦的“喜气洋洋”效应导致的明星，照亮走向我们，拉着由行星，和昏暗的，因为它移开。光子增亮结果“打桩”能量，以及光集中在明星的运动方向，由于相对论效应。   合著者Tsevi Mazeh特拉维夫大学“，说：”这是第一次，已用于这方面的爱因斯坦的相对论发现的行星。 “成千上万人疯狂下载。。。。。。 更多价值连城的绝密英语学习资料， 洛基内部秘密英语，技巧，策略 请在 网上 申请报名” 洛基国际英语 竭诚为您服务