Solidot: 天王星发现首个特洛伊小行星

Solidot

奇客的资讯，重要的东西

天王星发现首个特洛伊小行星
http://solidot.org.feedsportal.com/c/33236/f/556826/s/30ad2370/sc/17/l/0L0Ssolidot0Borg0Cstory0Dsid0F36271/story01.htm
Sep 2nd 2013, 04:47




特洛伊天体是指与行星和其它天体的轨道交迭的小行星或卫星，它们位于稳定的拉格朗日点L4或L5附近，并不会发生碰撞。科学家此前已经发现了火星、海王星、木星和地球的特洛伊小行星，现在他们首次发现了天王星的特洛伊小行星。小行星2011 QF99直径约60公里，由岩石和冰构成，类似彗星，它距离太阳19个天文单位。2011 QF99运行轨道的异常显示它只是天王星的临时伙伴，最初来自于太阳系的外围地区，科学家计算7万年后它将会逃离这个特洛伊点。This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers. Five Filters recommends: Massacres That Matter - Part 1 - 'Responsibility To Protect' In Egypt, Libya And SyriaMassacres That Matter - Part 2 - The Media Response On Egypt, Libya And SyriaNational demonstration: No attack on Syria - Saturday 31 August, 12 noon, Temple Place, London, UK



You are receiving this email because you subscribed to this feed at http://blogtrottr.com

If you no longer wish to receive these emails, you can unsubscribe here:
http://blogtrottr.com/unsubscribe/cz0/jPbdSR