Copyright:Jeff
Signorelli
原文:
Double, double toil and trouble; Fire burn, and cauldron bubble …. maybe Macbeth should have consulted the Witch Head Nebula. A frighteningly shaped reflection nebula, this cosmic crone is about 800 light-years away though. Its malevolent visage seems to glare toward nearby bright star Rigel in Orion, just off the right edge of this frame. More formally known as IC 2118, the interstellar cloud of dust and gas is nearly 70 light-years across, its dust grains reflecting Rigel’s starlight. In this composite portrait, the nebula’s color is caused not only by the star’s intense bluish light but because the dust grains scatter blue light more efficiently than red. The same physical process causes Earth’s daytime sky to appear blue, although the scatterers in planet Earth’s atmosphere are molecules of nitrogen and oxygen.
中文翻譯:
✨ 雙重、雙重，煩惱與麻煩；火焰燃燒，鍋子冒泡……也許《麥克白》中的角色應該諮詢一下女巫頭雲！這個形狀可怕的反射星雲距離我們約800光年，其兇惡的面容似乎向附近明亮的星星 Rigel（里戈爾）怒視，正好在這幅畫面的右邊。更正式地說，它被稱為 IC 2118，這個星際雲氣由塵埃和氣體組成，橫跨近70光年，其塵埃顆粒反射了 Rigel 的星光。在這幅合成肖像中，星雲的顏色不僅受到這顆恒星強烈藍色光芒的影響，還因為塵埃顆粒更有效地散射藍光而呈現出這種顏色。這種物理過程與地球白天的藍天形成原因相同，因為地球大氣中的氮和氧分子就是散射者。
#女巫頭雲 #IC2118 #宇宙之美 #星際之旅 #天文探索 #Rigel #反射星雲 #科學與藝術 #邊緣的宇宙
快來探索這迷人的宇宙奧秘吧！🌌🔭
來源:NASA每日圖片
