The familiar eyeball shape of the Helix Nebula shows only two dimensions of this complex body.
星云图片画廊.熟悉的眼球形状的螺旋星云显示只有两个层面对这一复杂的天体.
互联网
More complex body mechanics will take a stronger, more analytical mind and good observational skills.
更复杂的身体力学,则需要更强的分析思维力,以及很好的观察技巧.
互联网