hourglass nebula 中文意思是什麼
hourglass nebula
解釋
沙漏星雲-
Picture 1 : a hubble space telescope picture of the planetary nebula hubble 12 in the constellation of cassiopeia. a series of rings on both sides of the hourglass can be seen
圖片1 ：從哈勃太空望遠鏡所拍得哈勃12行星狀星雲，其漏斗形狀和繞著兩邊的層圈清晰可見。 -
Prof. sun kwok, chair professor and dean of science at the university of hong kong, believes that the rings seen in hubble 12 are related to the shaping of the nebula : " a series of fast, directional, periodic pulse ejections from the star carve out the remnants of previously ejected material and create the hourglass shape
郭教授相信，這些從哈勃12號星雲觀測所見的層圈，和星雲的形成不無關系。一連串高速周期性有方向性的爆發，將哈勃12號星雲雕刻成這漏斗形狀。 -
This hourglass nebula is the closing phase of a sun - like star s life as its outer layers are ejected
沙漏星雲是與太陽相似的恆星演化最後階段，恆星把外殼噴出，形成行星狀星雲。
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