加拿大上空的鬼魂状极光
2023年10月22日
Ghost Aurora over Canada
Image Credit & Copyright: Yuichi Takasaka, TWAN
Explanation: What does this aurora look like to you? While braving the cold to watch the skies above northern Canada early one morning in 2013, a most unusual aurora appeared. The aurora definitely appeared to be shaped like something, but what? Two ghostly possibilities recorded by the astrophotographer were “witch” and “goddess of dawn”, but please feel free to suggest your own Halloween-enhanced impressions. Regardless of fantastical pareidolic interpretations, the pictured aurora had a typical green color and was surely caused by the scientifically commonplace action of high-energy particles from space interacting with oxygen in Earth’s upper atmosphere. In the image foreground, at the bottom, is a frozen Alexandra Falls, while evergreen trees cross the middle.
Help Wanted: Professional-astronomer level guest writers and assistant editors for APOD
Tomorrow’s picture: Io from Juno
加拿大上空的鬼魂状极光
影像提供与提供: Yuichi Takasaka, TWAN
说明: 你认为这片极光像什么？2013年某天的清晨，在加拿大北部冒着酷寒观赏星空之时，天空出现了一片极不寻常的极光。这片极光的形状看起来像极什么…然而，到底是什么？这位天文摄影者拍到的幽灵光影形似女巫或黎明女神，不过请你尽管提出因万圣节而起的联想。不论这例空想性错视的诠释为何，这片极光带着常见的泛绿色泽，而且很确定是来自太空的高能粒子和地球高增大气的氧交互作用所引起的。在影像下端的前景，有冻结的亚历山德拉瀑布，而中央则有大片的常青树。
明日的图片: Io from Juno
好看