国际空间站穿越太阳
(原标题: International Space Station Crosses the Sun)
2025-05-21
浏览次数: 60
通常情况下，国际空间站只有在晚上才能看到。国际空间站（ISS）绕地球轨道缓慢地飘过夜空，大约每个月一次，从许多地方都可以看到它的亮点。因此，只有在日落之后或日出之前才能看到国际空间站，因为它是通过反射的阳光发光的——一旦国际空间站进入地球的阴影，它就会消失在视线之外。只有当国际空间站在白天从太阳正前方经过时，人们才能看到它。然后，它经过得如此之快，以至于只有短暂曝光的相机才能在视觉上将国际空间站的轮廓定格在背景太阳上。这张特色照片确实做到了这一点——它实际上是一个月前在西班牙圣费利乌德布哈勒拍摄的一系列照片，拍摄时机非常完美。这一系列图像后来与另一张单独的图像结合在一起，突出了活动太阳的纹理，其中包括太阳边缘周围的几个日珥。《天体惊喜》：APOD在你生日那天给你拍了什么照片？(1995后)
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Typically, the International Space Station is visible only at night. Slowly drifting across the night sky as it orbits the Earth, the International Space Station (ISS) can be seen as a bright spot about once a month from many locations. The ISS is then visible only just after sunset or just before sunrise because it shines by reflected sunlight -- once the ISS enters the Earth's shadow, it will drop out of sight. The only occasion when the ISS is visible during the day is when it passes right in front of the Sun. Then, it passes so quickly that only cameras taking short exposures can visually freeze the ISS's silhouette onto the background Sun. The featured picture did exactly that -- it is actually a series of images taken a month ago from Sant Feliu de Buixalleu, Spain with perfect timing. This image series was later combined with a separate image highlighting the texture of the active Sun which included several Sun's prominences around the edge. Celestial Surprise: What picture did APOD feature on your birthday? (post 1995)
© Pau Montplet Sanz