...
首页> 外文期刊>Sky & Telescope >Celestial Calendar
【24h】

Celestial Calendar

机译:天历

获取原文
获取原文并翻译 | 示例
           

摘要

THE CALENDAR of annual meteor showers is nearly empty in the first half of the year and rich in the second, for no good reason but coincidence. The meteoroid streams that cause showers, bits of rubble shed by crumbling comets, probably disperse in a matter of many millennia. Nearly all the best streams that currently intersect Earth's orbit do so on the orbit's early-July to early-January side, but that's probably just a temporary fluke. There's nothing in the inherent arrangement of comets, planets, or gravitational perturbations that should systematically favor one side of our orbit over the other.
机译:每年流星雨的日历在上半年几乎是空的,而在下半年则是丰富的,这完全是出于巧合。流星雨引起的阵雨,是由于彗星破碎而散落的瓦砾,可能在几千年的时间里散布开来。目前,与地球轨道相交的几乎所有最佳水流都在7月初至1月初的轨道上交汇,但这可能只是暂时的uke幸。彗星,行星或引力扰动的固有排列中,没有什么应该系统地偏爱我们轨道的一侧。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号