英仙座和魔法
(原标题: Perseids and MAGIC)
2022-08-11
浏览次数: 14
2021年8月11日，在拉帕尔马的加那利岛上，一个多镜，直径17米的MAGIC望远镜从Roque de los Muchachos欧洲北方天文台反射出这片繁星点点的夜空。MAGIC代表主要大气伽马成像切伦科夫。望远镜可以看到高能伽马射线撞击地球上层大气时粒子空气阵雨中产生的短暂的光学闪光。对于适应黑暗的眼睛来说，镜片提供了沿着我们银河系平面的恒星和星云的诱人反射。但在分割镜望远镜的正后方，在地平线的低处，是英仙座。在那一天，这幅戏剧性的合成夜景也捕捉到了每年英仙座流星雨的辐射。今年英仙座流星雨活动将在8月13日左右再次达到高峰，但英仙座流星雨将不得不与满月的明亮光芒竞争。
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On August 11, 2021 a multi-mirror, 17 meter-diameter MAGIC telescope reflected this starry night sky from the Roque de los Muchachos European Northern Observatory on the Canary Island of La Palma. MAGIC stands for Major Atmospheric Gamma Imaging Cherenkov. The telescopes can see the brief flashes of optical light produced in particle air showers as high-energy gamma rays impact the Earth's upper atmosphere. To the dark-adapted eye the mirror segments offer a tantalizing reflection of stars and nebulae along the plane of our Milky Way galaxy. But directly behind the segmented mirror telescope, low on the horizon, lies the constellation Perseus. And on that date the dramatic composite nightscape also captured meteors streaming from the radiant of the annual Perseid meteor shower. This year the Perseid shower activity will again peak around August 13 but perseid meteors will have to compete with the bright light of a Full Moon.
© Urs Leutenegger