冰岛上空的螺旋极光
(原标题: Spiral Aurora over Iceland)
2023-01-11
浏览次数: 18
这个场景可能看起来像一个幻想，但它真的是冰岛。岩石拱门被命名为Gatklettur，位于该岛的西北海岸。前景中一些较大的岩石直径达一米。岩石上的雾实际上是长时间曝光后的平均移动波。这张特色图片是去年11月同一晚在同一地点用同一台相机拍摄的几张前景和背景照片的合成图。地点被选为风景如画的前景，但时间的安排是为了它丰富多彩的背景：极光。远在拱门后面的螺旋极光，是这位天体摄影师一生中见过的最明亮的极光之一。然而，盘绕的图案转瞬即逝，因为在寒冷的夜晚，极光图案会在几个小时内波动和跳舞。远处的背景是不变的星星，地球的自转使它们看起来在靠近北极星的天空最北端缓慢地旋转。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
查看原文解释
The scene may look like a fantasy, but it's really Iceland. The rock arch is named Gatklettur and located on the island's northwest coast. Some of the larger rocks in the foreground span a meter across. The fog over the rocks is really moving waves averaged over long exposures. The featured image is a composite of several foreground and background shots taken with the same camera and from the same location on the same night last November. The location was picked for its picturesque foreground, but the timing was planned for its colorful background: aurora. The spiral aurora, far behind the arch, was one of the brightest seen in the astrophotographer's life. The coiled pattern was fleeting, though, as auroral patterns waved and danced for hours during the cold night. Far in the background were the unchanging stars, with Earth's rotation causing them to appear to slowly circle the sky's northernmost point near Polaris. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
© Stefano Pellegrini