Sometimes called the Iris Nebula and dutifully cataloged as NGC 7023, this is not the only nebula in the sky to evoke the imagery of flowers.

 
  • 有时被称为彩虹星云,而实实在在被编目为NGC 7023,它可不是天空中唯一会让人联想到花的星云。
今日热词
目录 附录 查词历史