2021年8月20日

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Three Perseid Nights
Image Credit & Copyright:
Balint Lengyel

Explanation: Frames from a camera that spent three moonless nights under the stars create this composite night skyscape. They were recorded during August 11-13 while planet Earth was sweeping through the dusty trail of comet Swift-Tuttle. One long exposure, untracked for the foreground, and the many star tracking captures of Perseid shower meteors were taken from the village of Magyaregres, Hungary. Each aligned against the background stars, the meteor trails all point back to the annual shower’s radiant in the constellation Perseus heroically standing above this rural horizon. Of course the comet dust particles are traveling along trajectories parallel to each other. The radiant effect is due only to perspective, as the parallel tracks appear to converge in the distance against the starry sky.

Notable APOD Image Submissions: Perseid Meteor Shower 2021

Tomorrow’s picture: mutual events


三个英仙座流星洒落的夜晚
影像提供与版权:
Balint Lengyel

说明: 用同一部相机在3个无月光干扰星夜拍下的照片,组合成这幅夜空影像。这三个夜晚为8月11-13日,当地球穿过史威福·塔托彗星尘尾之时。其中1张无追踪的长曝光照片,用以记录位在匈牙利马扎瑞格瑞斯村的前景,其他记录英仙座流星的照片,则以恒星为追踪标的,然后再根据背景恒星对齐叠合。在影像中,所有的流星痕皆回指位在野外地平线上方、英仙座之内的流星雨辐射点。相当然耳,这些彗星尘埃微粒的轨迹皆彼此平行。只因为透视造成的辐射效应,让这些原先平行的流星痕,看似会聚在星空中的某一点。

值得注意的提交给APOD的图像:2021年英仙座流星雨

明日的图片: mutual events

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