北天的极光
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标签： 北极星
北极星及其周围的尘埃
2023年4月11日 North Star: Polaris and Surrounding Dust Image Credit & Copyright: Javier Zayaz Explanation: Why is Polaris called the North Star? First, Polaris is the nearest bright star toward the north spin axis of the Earth. Therefore, as the Earth turns, stars appear to revolve around Polaris, but Polaris itself always stays in the same northerly direc...
北极星与ZTF彗星的迹线
2023年2月3日 Polaris and the Trail of Comet ZTF Image Credit & Copyright: David Ibarra Gomez Explanation: Stars trace concentric arcs around the North Celestial Pole in this three hour long night sky composite, recorded with a digital camera fixed to a tripod on January 31, near Àger, Lleida, Spain. On that date Comet C/2022 E3 (ZTF) was near its northernm...
北天极与古树
2022年7月28日 North Celestial Tree Image Credit & Copyright: Jeff Dai (TWAN) Explanation: An ancient tree seems to reach out and touch Earth’s North Celestial Pole in this well-planned night skyscape. Consecutive exposures for the timelapse composition were recorded with a camera fixed to a tripod in the Yiwu Desert Poplar Forests in northwest Xinjia...
北极星与它周围的尘埃
2021年04月28日 North Star: Polaris and Surrounding Dust Image Credit & Copyright: Bray Falls Explanation: Why is Polaris called the North Star? First, Polaris is the nearest bright star toward the north spin axis of the Earth. Therefore, as the Earth turns, stars appear to revolve around Polaris, but Polaris itself always stays in the same northerly direct...
夜空中最亮的25颗星
2019 June 25 夜空中最亮的25颗星 影像来源及版权:Tragoolchitr Jittasaiyapan 说明：你知道一些最亮星的名称吗？你很可能知道，即使一些亮星的名称如此古老，它们可以追溯到有文字记载的初期。许多世界文化对最亮星都赋予了他们自己的名称，记住它们在文化和历史上都是非常重要的。然而，为了清楚的进行国际交流，国际天文学联合会（IAU）已经开始指定标准的恒星名称。以上这幅真彩色特征影像呈现了目前人类所看到夜空中最亮的25颗星，加上它们被IAU确认的名字。一些恒星的名称具有有趣的含义，包括天狼星（拉丁语是“炎热天气”）、织女星（阿拉伯语是“坠落”）和心宿二（希腊语是“与火星竞争”）。你可能也不太熟悉其他的亮星名称，即使熟悉的北极星因为太过黯淡而不能列入这份名单中。 25 Brightest...