NASA·APOD每日天文一图2022.6.3 [超高清]

南北银河全图！！！

With this creative astro-collaboration you can follow the plane of our Milky Way Galaxy as it bridges northern and southern hemisphere skies. To construct the expansive composite nightscape, skies over Observatorio El Sauce in Chile (top) were imaged on the same date but 6 hours later than the skies over the Saint-Veran observatory in the French Alps. The 6 hour time-lag allowed Earth's rotation to align the Milky Way above domes at the two sites. All exposures were made with similar cameras and lenses mounted on simple tripods. A faint greenish airglow is visible in the dark Chilean sky that also features the Large and Small Magellanic Clouds near the observatory dome. In the French Alps light pollution is apparent, but the distant Andromeda Galaxy can still be spotted near the horizon in the northern night. On planet Earth the two observatories are separated by about 10,000 kilometers. 

有了这项创造性的天文合作，你可以沿着银河系的平面，在南北半球的天空之间架起桥梁。为了构建广阔的复合夜景，智利El Sauce天文台（上图）的天空在同一天拍摄，但比法国阿尔卑斯山圣韦兰天文台的天空晚了6个小时。6小时的时间延迟使地球自转使银河系在两个地点的圆顶上方对齐。所有的曝光都是用类似的相机和安装在简单三脚架上的镜头进行的。在智利黑暗的天空中，可以看到微弱的绿色辉光，这也是天文台圆顶附近大小麦哲伦云的特征。在法国阿尔卑斯山，光污染很明显，但在北边的夜晚，遥远的仙女座星系仍然可以在地平线附近被发现。在地球上，这两个天文台相距约10000公里。