意大利上空的红色极光

2023年11月6日

Red Aurora over Italy
Image Credit & Copyright: Giorgia Hofer

Explanation: What was that red glow on the horizon last night? Aurora. Our unusually active Sun produced a surface explosion a few days ago that sent out a burst of electrons, protons, and more massive charged nuclei. This coronal mass ejection (CME) triggered auroras here on Earth that are being reported unusually far south in Earth’s northern hemisphere. For example, this was the first time that the astrophotographer captured aurora from her home country of Italy. Additionally, many images from these auroras appear quite red in color. In the featured image, the town of Comelico Superiore in the Italian Alps is visible in the foreground, with the central band of our Milky Way galaxy seen rising from the lower left. What draws the eye the most, though, is the bright red aurora on the far right. The featured image is a composite with the foreground and background images taken consecutively with the same camera and from the same location.

Aurora Album: Selected images sent in to APOD

Tomorrow’s picture: devil on mars

意大利上空的红色极光
影像提供与版权: Giorgia Hofer

说明: 昨晚出现在地平线上方的泛光辉光是什么？极光。数天前，我们格外活跃的太阳发生了一次表面爆发，并喷出一大团电子、质子和更重的带电原子核。这例日冕物质抛射（CME）触发了地球上的极光，而据报导，就连在地球北半球很靠南的地区，也能见到极光。举例来说，这位意大利天文摄影者，即是生平首次在该国拍到极光。此外，在许多记录这些极光的影像里，极光的色泽极红。在这幅摄于意大利阿尔卑斯山中，以上科梅利科镇为前景的主题影像里，可见到我们银河系的中央盘面从左下角升起。然而，其中最吸睛的还是右缘的鲜红极光。这张主题影像，是由同一部相机在相同位置连续拍摄的前景和背景照片组合而成。