船底座星云的云
(原标题: Clouds of the Carina Nebula)
2021-05-02
浏览次数: 33
在船底座星云的迷雾中潜伏着什么？黑暗的不祥的数字实际上是分子云，分子气体和尘埃的结如此之厚，以至于变得不透明。然而，相比之下，这些云的密度通常比地球大气小得多。这是一张船底座星云核心的详细图像，在这个部分，黑暗和彩色的气体云和尘埃云都特别突出。这张照片是2016年年中在澳大利亚赛丁泉天文台拍摄的。虽然星云主要由氢气组成——这里是绿色的，但图像被指定了颜色，以便由微量的硫和氧发出的光分别呈现红色和蓝色。整个船底座星云，编号为NGC 3372，跨度超过300光年，位于船底座约7500光年远的地方。船底二是星云中最具活力的恒星，在19世纪30年代曾是天空中最亮的恒星之一，但后来急剧褪色。
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What forms lurk in the mists of the Carina Nebula? The dark ominous figures are actually molecular clouds, knots of molecular gas and dust so thick they have become opaque. In comparison, however, these clouds are typically much less dense than Earth's atmosphere. Featured here is a detailed image of the core of the Carina Nebula, a part where both dark and colorful clouds of gas and dust are particularly prominent. The image was captured in mid-2016 from Siding Spring Observatory in Australia. Although the nebula is predominantly composed of hydrogen gas -- here colored green, the image was assigned colors so that light emitted by trace amounts of sulfur and oxygen appear red and blue, respectively. The entire Carina Nebula, cataloged as NGC 3372, spans over 300 light years and lies about 7,500 light-years away in the constellation of Carina. Eta Carinae, the most energetic star in the nebula, was one of the brightest stars in the sky in the 1830s, but then faded dramatically.
© John Ebersole