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Explanation: Braided and serpentine filaments of glowing gas suggest this nebula's popular name, The Medusa Nebula. Also known as Abell 21,…

Explanation: Stars can create huge and intricate dust sculptures from the dense and dark molecular clouds from which they are born. The…

“哦，天哪！看那副画面！地球就要升起来了。哇，真漂亮！” 在这句话后不久，50 年前的今天，有史以来最著名的照片之一在月球轨道上被拍摄了下来。这幅现在被称为《地出》的标志性照片展示了阿波罗 8 号船员拍摄的地球从月球边缘升起的画面。但广为流传的那张地出照片实际上是第二张拍摄到的…

What is the cause of this unusual parabolic structure? This illuminated cavity, known as LDN 1471, was created by a newly forming star…