变色龙暗星云
(原标题: Chamaeleon Dark Nebulas)
2025-11-19
浏览次数: 1525
有时星际空间的黑暗尘埃有一种棱角分明的优雅。这就是最南的变色龙星座的情况。暗尘埃通常太暗而看不见，最著名的是阻挡来自其背后的恒星和星系的可见光。然而，在这11.4小时的曝光中，尘埃主要是在其自身的光线中被看到的，其强烈的红色和近红外颜色形成了棕色色调。在V星的右上方可以看到一颗明亮的变色龙贝塔星（Beta Chamaeleontis），与之形成鲜明对比的是蓝色，它周围的尘埃优先反射蓝光，因为它的主要颜色是蓝白色。所有照片中的恒星和尘埃都发生在我们的银河系中，但有一个值得注意的例外：变色龙Beta下方的一个白点是遥远的星系IC 3104。星际尘埃主要是在巨大恒星的冷大气中产生的，并通过恒星光、恒星风和超新星等恒星爆炸分散到太空中。
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Sometimes the dark dust of interstellar space has an angular elegance. Such is the case toward the far-south constellation of Chamaeleon. Normally too faint to see, dark dust is best known for blocking visible light from stars and galaxies behind it. In this 11.4-hour exposure, however, the dust is seen mostly in light of its own, with its strong red and near-infrared colors creating a brown hue. Contrastingly blue, a bright star Beta Chamaeleontis is visible on the upper right of the V, with the dust that surrounds it preferentially reflecting blue light from its primarily blue-white color. All of the pictured stars and dust occur in our own Milky Way Galaxy with one notable exception: a white spot just below Beta Chamaeleontis is the galaxy IC 3104, which lies far in the distance. Interstellar dust is mostly created in the cool atmospheres of giant stars and dispersed into space by stellar light, stellar winds, and stellar explosions such as supernovas.
© Xinran Li & Houbo Zhao