半圆顶上空的昴宿星
(原标题: Pleiades over Half Dome)
2022-07-19
浏览次数: 18
星星是成群出现的。天空中最著名的一群恒星是昴宿星团，这是一个很容易用肉眼看到的明亮星团。昴星团距离我们只有450光年远，形成于大约1亿年前，并且可能会持续大约2.5亿年。我们的太阳很可能诞生于一个星团中，但现在，它已经有45亿年的历史了，它的伴星早就分散了。昴宿星团在美国加州约塞米蒂国家公园著名的岩石结构“半圆顶”上拍摄。这张特色图像是由28张前景曝光和174张恒星背景图像合成的，所有这些图像都是在2019年10月的同一个晚上，由同一台相机在同一地点拍摄的。在计算了未来昴宿星团和半圆顶星团并置的时间之后，这位天文摄影师意外地得到了一次停电的回报，使得背景天空异常黑暗。
查看原文解释
Stars come in bunches. The most famous bunch of stars on the sky is the Pleiades, a bright cluster that can be easily seen with the unaided eye. The Pleiades lies only about 450 light years away, formed about 100 million years ago, and will likely last about another 250 million years. Our Sun was likely born in a star cluster, but now, being about 4.5 billion years old, its stellar birth companions have long since dispersed. The Pleiades star cluster is pictured over Half Dome, a famous rock structure in Yosemite National Park in California, USA. The featured image is a composite of 28 foreground exposures and 174 images of the stellar background, all taken from the same location and by the same camera on the same night in October 2019. After calculating the timing of a future juxtaposition of the Pleiades and Half Dome, the astrophotrographer was unexpectedly rewarded by an electrical blackout, making the background sky unusually dark.
© Dheera Venkatraman