THE OUTLINES OF fruitful theories for the shaping of planetary nebulae continue to emerge.The trick is to develop models that embrace the entire vexing array of observations.

 
  • 能将行星状星云的形成完整解释的理论,轮廓越来越明显,诀窍在于要能接纳这一大堆令人苦恼的观测结果。
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