Astronomy Picture of the Day——木星上海豚云的增强影像
Enhanced: The Dolphin Cloud on Jupiter
Image Credit: NASA, Juno, SwRI, MSSS;Processing: Gerald Eichstädt & Avi Solomon
Explanation: Do you see the dolphin shapedcloud on Jupiter? The cloud was visible last year during perijove 16, thesixteenth time that NASA\'s robotic spacecraft Juno passed near Jupiter since itarrived in mid 2016. During each perijove, Juno passes near a slightly different part of Jupiter\'s cloud tops. The dolphin shape may be surprising butis not scientifically significant clouds on Jupiter and Earth are constantlyshifting and can temporarily mimic many familiar shapes. The cloud appears inJupiter\'s South Temperate Belt (STB), a band of dark and dropping clouds thatrings the planet and also contains Oval BA, dubbed Red Spot Jr. The featuredimage was digitally processed to enhance color and contrast. Juno\'s next swoopnear Jupiter perijove 20 will occur onlate May.
木星上海豚云的增强影像
你看到过木星上海豚形的云吗？这片云是去年由NASA的朱诺号飞船在飞掠近木星点时发现的，这也是自2016年年中朱诺号到达木星以来，第十六次经过木星附近。每一次掠过近木星点时，朱诺号都会经过木星云顶稍有不同的区域。海豚形的云可能会令人惊讶，但它并没有科学意义，因为木星和地球上的云一样，都在不停地移动，能够暂时变化出许多熟悉的形状。这片云出现在木星的南温带，它是一条环绕行星的黑暗下沉云带，其中还包含名为小红斑的卵斑BA。这幅照片进行数字处理之后，增强了色彩和对比度。朱诺号下一次飞掠近木星点将发生在5月下旬。
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Astronomy Picture of the Day——阿波罗12号造访勘测者3号