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2018-11-21
2018年11月21日:朱诺号拍摄的木星涡漩和色彩-(Swirls and Colors on Jupiter from Juno)
2018年11月21日:朱诺号拍摄的木星涡漩和色彩-(Swirls and Colors on Jupiter from Juno)--原图下载{mtitle title="朱诺号拍摄的木星涡漩和色彩"/}Image Credit: NASA, Juno, SwRI, MSSS; Processing & License: Matt Brealey, Se�n Doran说明: 木星云层的色彩是怎么来的?没人能说个准。因为木星 厚重大气的主要成分是氢和氦,这些在低温木星云顶是无色的元素。所以到底是那些微量元素成就了木星云层的色泽,仍然是研究的题材,不过含量不多的硫化氢铵是可能的候选者之一。在这张色泽经过强化的主题影像及其他类似的影像里,相当明确的是淡色云的高度通常高于暗色云。在这张影像里,淡色云盘旋在右下角的泛红区之周围,而在右上角,它们则像是覆盖在部分暗区的上方。这张主题影像,是今年初朱诺号太空船在第14次近距离掠过木星之时所拍摄。在椭圆的环形轨道上,朱诺号每53天掠过这颗巨行星附近,每次探索一片稍微不同的区域。{lamp/}原文:{mtitle title="Swirls and Colors on Jupiter from Juno"/}Image Credit: NASA, Juno, SwRI, MSSS; Processing & License: Matt Brealey, Se�n DoranExplanation: What creates the colors in Jupiter's clouds?No one is sure. The thick atmosphere of Jupiter is mostly hydrogen and helium, elements which are colorless at the low temperatures of the Jovian cloud tops.Which trace elements provide the colors remains a topic of research, although small amounts of ammonium hydrosulfide are one leading candidate. What is clear from the featured color-enhanced image -- and many similar images -- is that lighter clouds are typically higher up than darker ones.Pictured, light clouds swirl around reddish regions toward the lower right, while they appear to cover over some darker domains on the upper right.The featured image was taken by the robotic Juno spacecraft during its 14th low pass over Jupiter earlier this year. Juno continues in its looping elliptical orbit, swooping near the huge planet every 53 days and exploring a slightly different sector each time around.
2018年11月21日
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2018-06-05
2018年06月05日:複杂的木星-(Complex Jupiter)
2018年06月05日:複杂的木星-(Complex Jupiter)--原图下载{mtitle title="複杂的木星"/}Image Credit: NASA, Juno, SwRI, MSSS; Composition: David Marriott说明: 木星能有多複杂呢?美国航太总署的木星朱诺号任务发现,木星的複杂度超出预期。科学家发现木星的磁场,相较于地球单纯的偶极磁场有很大的差异,除了拥有多个嵌在複杂缠绕磁场里的磁极之外,磁场纠缠的程度北半球更甚于南半场。此外,朱诺号的无线电波量测证实,木星的大气结构远深入上方云层之下,甚至深入达数百公里之多。木星刚发现的複杂性可在南半球的云层上清楚见到,如这张主题影像所示。在影像里,赤道区主宰性的环行星云区和云带,转变成由洲陆大小的涡漩状风暴系统聚合成的複杂云系。朱诺号持续在高度椭圆的轨道上运行,每53天近距离掠过这颗巨行星一次,每次探索一个稍微不同的区块。{lamp/}原文:{mtitle title="Complex Jupiter"/}Image Credit: NASA, Juno, SwRI, MSSS; Composition: David MarriottExplanation: How complex is Jupiter?NASA's Juno mission to Jupiter is finding the Jovian giant to be more complicated than expected.Jupiter's magnetic field has been discovered to be much different from our Earth's simple dipole field, showing several poles embedded in a complicated network more convoluted in the north than the south.Further, Juno's radio measurements show that Jupiter's atmosphere shows structure well below the upper cloud deck -- even hundreds of kilometers deep.Jupiter's newfound complexity is evident also in southern clouds, as shown in the featured image. There, planet-circling zones and belts that dominate near the equator decay into a complex miasma of continent-sized storm swirls. Juno continues in its looping elliptical orbit, swooping near the huge planet every 53 days and exploring a slightly different sector each time around.
2018年06月05日
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