国际空间站与土星相遇
(原标题: ISS Meets Saturn)
2025-07-18
浏览次数: 1498
这个月，明亮的土星在夜空中升起，从地球上看，它的光环几乎是正面的。7月6日凌晨，从美国华盛顿联邦大道的一个地方看，它与国际空间站短暂合影。这张精心设计的图像，是一堆视频帧，在同一个望远镜视野中捕捉到它们瞬间的结合。由于国际空间站在近地轨道上，空间站和气态巨行星相隔近14亿公里。它们的表观大小相当，但国际空间站比土星亮得多，而且在堆叠的图像中，土星的亮度已经增加了。要捕捉到国际空间站与土星的交会，需要精确的时间和精确的位置。
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This month, bright planet Saturn rises in evening skies, its rings oriented nearly edge-on when viewed from planet Earth. And in the early morning hours on July 6, it posed very briefly with the International Space Station when viewed from a location in Federal Way, Washington, USA. This well-planned image, a stack of video frames, captures their momentary conjunction in the same telescopic field of view. With the ISS in low Earth orbit, space station and gas giant planet were separated by almost 1.4 billion kilometers. Their apparent sizes are comparable but the ISS was much brighter than Saturn and the ringed planet's brightness has been increased for visibility in the stacked image. Precise timing and an exact location were needed to capture the ISS/Saturn conjunction.
© A.J. Smadi