视频：伦纳德彗星一小时
(原标题: Video: Comet Leonard over One Hour)
2022-01-25
浏览次数: 17
这颗彗星的方向是什么？从彗尾来看，有人可能会认为伦纳德彗星正在向右下方移动，但一个完整的3D分析显示，它几乎是在远离摄像机的方向移动。从这个角度看，尘埃的尾巴被拖向相机，只能看到彗星头部附近短暂的黄白色辉光。然而，蓝色的离子尾巴是由逃逸的离子组成的，这些离子被太阳风直接驱离太阳，但沿着太阳的磁力线引导。然而，太阳的磁场是相当复杂的，偶尔太阳磁重联会将离子尾打破成结，并被推离太阳。在12月下旬从泰国拍摄的一小时延时视频中可以看到一个这样的结。伦纳德彗星正在逐渐淡出我们的太阳系。图片库：2021年提交给APOD的伦纳德彗星的著名图像
查看原文解释
Which direction is this comet heading? Judging by the tail, one might imagine that Comet Leonard is traveling towards the bottom right, but a full 3D analysis shows it traveling almost directly away from the camera. With this perspective, the dust tail is trailed towards the camera and can only be seen as a short yellow-white glow near the head of the comet. The bluish ion tail, however, is made up of escaping ions that are forced directly away from the Sun by the solar wind -- but channeled along the Sun's magnetic field lines. The Sun's magnetic field is quite complex, however, and occasionally solar magnetic reconnection will break the ion tail into knots that are pushed away from the Sun. One such knot is visible in the featured one-hour time-lapse video captured in late December from Thailand. Comet Leonard is now fading as it heads out of our Solar System. Gallery: Notable images submitted to APOD of Comet Leonard in 2021
© Matipon Tangmatitham (NARIT); Text: Matipon Tangmatitham