每日一图 (每日约13.30更新)
Many bright nebulae and star clusters in planet Earth's sky are associated with the name of astronomer Charles Messier from his famous 18th century catalog. His name is also given to these two large and remarkable craters on the Moon. Standouts in the dark, smooth lunar Sea of Fertility or Mare Fecunditatis, Messier (left) and Messier A have dimensions of 15 by 8 and 16 by 11 kilometers respectively. Their elongated shapes are explained by the extremely shallow-angle trajectory followed by an impactor, moving left to right, that gouged out the craters. The shallow impact also resulted in two bright rays of material extending along the surface to the right, beyond the picture. Intended to be viewed with red/blue glasses (red for the left eye), this striking stereo picture of the crater pair was recently created from high resolution scans of two images (AS11-42-6304, AS11-42-6305) taken during the Apollo 11 mission to the Moon.
最新异域文明研究活动 发起新活动
推荐阅读： (only temp appear)
投稿发表在首页
看了几个视频，非常担忧孤独终老
发表于：2022-10-05 17:22:25
双腿残疾的我，下半生的心愿
发表于：2023-03-22 15:47:16
睡梦中与女孩亲吻
发表于：2023-04-23 03:51:36
再次回忆北京五道口吃饭时遇到的女孩
发表于：2022-09-08 15:52:55
我失去了爱情吗？
发表于：2022-06-22 05:46:16
和老同学沟通有了错误
发表于：2023-01-30 02:31:57
情路艰难
发表于：2022-05-21 19:11:15
电动牙刷按钮损坏
发表于：2022-04-21 02:28:01
今天做核酸检测
发表于：2022-03-07 07:07:30
今天准备联系老同学，兑换福彩彩票
发表于：2022-02-23 01:47:06
科技渴求榜 渴求
今天，又是渴求大奖
(IMP: 2700 )
一直为表弟的肾衰竭担心，异域文明请传授治疗技术
(IMP: 700 )
我的人生生存和发展基础难道是可鄙的？
(IMP: 200 )
用户，头衔，积分
User 吴鹏 has points :992300 .
ACQs :
34
CCAs:
16
ACCS:
7
User peng wu has points :48400 .
ACQs :
2
CCAs:
0
ACCS:
0
User wup has points :3800 .
ACQs :
0
CCAs:
0
ACCS:
0
User 我来自于星空 has points :1200 .
ACQs :
0
CCAs:
0
ACCS:
0