美国国家航空航天局NASA每日一图(天文)-2017年7月2日

2017 July 2

Mountains of Dust in the Carina Nebula
Image Credit: NASA, ESA, and M. Livio (STScI)
Explanation: It's stars versus dust in the Carina Nebula and the stars are winning. More precisely, the energetic light and winds from massive newly formed stars are evaporating and dispersing the dusty stellar nurseries in which they formed. Located in the Carina Nebula and known informally as Mystic Mountain, these pillar's appearance is dominated by the dark dust even though it is composed mostly of clear hydrogen gas. Dust pillars such as these are actually much thinner than air and only appear as mountains due to relatively small amounts of opaque interstellar dust. About 7,500 light-years distant, the featured image was taken with the Hubble Space Telescope and highlights an interior region of Carina which spans about three light years. Within a few million years, the stars will likely win out completely and the entire dust mountain will evaporate.

2017年7月2日

船底座星云图像的星云:NASA,欧空局和Livio(STScI)

解释:它的恒星与船底座星云中的尘埃和恒星的胜利有关。更准确地说,来自巨大新恒星的能量光和风正在蒸发和驱散他们形成的尘埃恒星托儿所。在船底座星云,被非正式地称为神秘山,这些柱子的外观主要由黑暗尘埃所主宰,尽管它主要是由清澈的氢气组成的。像这样的支柱实际上比空气要薄得多,而且只因不透明星际尘埃的数量相对较少而出现在山上。距离7500光年远的地方,这幅有特色的照片是用哈勃太空望远镜拍摄的,并强调了船底座的内部区域,跨度大约为三光年。在几百万年内,恒星将会完全消失,整个尘埃山将会蒸发。

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