阿方索斯和阿尔扎切尔
(原标题: Alphonsus and Arzachel)
2021-07-17
浏览次数: 36
把你的望远镜对准今晚的上弦月。沿着明暗分界线，也就是日夜之间的阴影线，你可能会发现这两个大陨石坑像猫头鹰一样凝视着你。阿方索斯（左）和阿尔扎切尔是古老的撞击坑，位于月球云海Nubium的东北海岸。较大的阿方索斯星直径超过100公里。太阳角度较低，在明亮的阳光和黑暗的阴影中突出了火山口1.5公里高的中央山峰。为了寻找阿波罗登月计划的潜在着陆点，“游侠9号”宇宙飞船于1965年在阿方索斯中央山脉东北方向（左上角）的陨石坑坠毁前，传回了阿方索斯的特写照片。Alpetragius位于Alphonsus和Arzachel之间，是一个小陨石坑，底部阴影很深，中央有超大的喙。
查看原文解释
Point your telescope at tonight's first quarter Moon. Along the terminator, the shadow line between night and day, you might find these two large craters staring back at you with an owlish gaze. Alphonsus (left) and Arzachel are ancient impact craters on the north eastern shores of Mare Nubium, the lunar Sea of Clouds. The larger Alphonsus is over 100 kilometers in diameter. A low sun angle highlights the crater's sharp 1.5 kilometer high central peak in bright sunlight and dark shadow. Scouting for potential Apollo moon landing sites, the Ranger 9 spacecraft returned closeup pictures of Alphonsus before crashing in the crater just northeast (toward the upper left) of its central mountain in 1965. Alpetragius, between Alphonsus and Arzachel, is the small crater with the deeply shadowed floor and overly large central beak.
© Noel Donnard