本色的冥王星
(原标题: Pluto in True Color)
2024-01-28
浏览次数: 17
冥王星到底是什么颜色的？我花了些功夫才弄明白。即使考虑到2015年机器人新视野号宇宙飞船飞过冥王星时发回地球的所有图像，处理这些多光谱帧以近似人眼所看到的图像也是具有挑战性的。这里展示的结果是在新视野号获得原始数据三年后发布的，是迄今为止拍摄的分辨率最高的冥王星真彩图像。在图像中可以看到，汤博地区是浅色的心形区域，由冷冻氮组成的平滑的斯普特尼克平原出人意料地填满了它的西部叶。“新视野号”发现，这颗矮行星的表面异常复杂，由许多颜色明显不同的区域组成。总的来说，冥王星大部分是棕色的，其暗淡的颜色主要来自太阳紫外线照射下的少量表面甲烷。
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What color is Pluto, really? It took some effort to figure out. Even given all of the images sent back to Earth when the robotic New Horizons spacecraft sped past Pluto in 2015, processing these multi-spectral frames to approximate what the human eye would see was challenging. The result featured here, released three years after the raw data was acquired by New Horizons, is the highest resolution true color image of Pluto ever taken. Visible in the image is the light-colored, heart-shaped, Tombaugh Regio, with the unexpectedly smooth Sputnik Planitia, made of frozen nitrogen, filling its western lobe. New Horizons found the dwarf planet to have a surprisingly complex surface composed of many regions having perceptibly different hues. In total, though, Pluto is mostly brown, with much of its muted color originating from small amounts of surface methane energized by ultraviolet light from the Sun.