短語詞組短語pre -planetary nebula 前行星狀星云Blinking Planetary Nebula 英語bipolar r planetary nebula 雙極行星狀星云bipolar planetary nebula 雙極行星狀星云;行星狀星云proto -planetary nebula 原行星狀星云;原始行星狀星云Blue Planetary Nebula 英語Planetary nebula luminosity function 行星狀星云亮度函數(shù)The Rotten Egg Planetary Nebula 行星狀星云 返回 planetary nebula