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天文现象

三颗行星同时排列拉西拉天文台峰顶上的天空[1]

天文事件是涉及一个或多个天体天文现象。天文事件的一些例子有:月球周期性的月相变化、日食月食凌日掩星、行星的流星雨彗星的飞越、分点至点等等[2]

可预测的天文事件

  • 掩食现象:掩星
  • 各类天体位置:如太阳月球行星卫星小行星等位置
  • 天体与地球、太阳的相对位置的更替
    • 月球与地球相对位置:朔─上弦─望─下弦、月球过远(近)地点
    • 内行星视运动:上合(外合)─东大距─留─内合(下合)─留─西大距─上合(外合)
    • 外行星(小行星)视运动:留─冲日─留─合日
  • 天体与天体之间视位置接近,如行星合月、双(三或更多)星伴月、土星合鬼星团、五星连珠等等。
  • 彗星接近太阳、地球
  • 流星雨
  • 变星光度极小、极大

突发的天文事件

突发而不能预期的天象:

其它

严格来说,太空站凌日或凌月,铱闪光等人造卫星的现象等,虽然不是天文现象,但由于可根据其轨道计算出可见地区和时刻,近年来也成为天文爱好者观测的对象之一。

须要注意的是,彩虹等这些由大气或相关大气衍生的现象,不算是天文现象;在1999年以来,每年皆有民众甚至传媒把黄昏(日落前后不久)在西方暮光中看到的明亮的飞机尾迹误当作为异常明亮的彗星

相关条目

参考资料

  1. ^ Planets Align Over La Silla. ESO Picture of the Week (European Southern Observatory). [2014-05-10]. (原始内容存档于2017-12-19). 
  2. ^ Astronomy Calendar of Celestial Events for Calendar Year 2019页面存档备份,存于互联网档案馆), www.seasky.org
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天文现象
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