来自赤月的紫外线中的金星
(原标题: Venus in Ultraviolet from Akatsuki)
2023-07-03
浏览次数: 13
为什么金星和地球如此不同？为了找到答案，日本发射了机器人“赤月”宇宙飞船，该飞船在经历了为期五年的内太阳系冒险之后，于2015年底进入了金星轨道。尽管赤月号已经超过了原计划的使用寿命，但航天器和仪器运行良好，恢复了原来的大部分任务。也被称为金星气候轨道器，赤月的仪器调查了关于地球姐妹行星的未知，包括火山是否仍然活跃，闪电是否会在稠密的大气中发生，以及为什么风速大大超过地球的自转速度。在赤月的紫外线相机拍摄的特色图像中，可以看到金星白天的一面有行星尺度的v形云图案。该图像显示了三种紫外线颜色，并显示出二氧化硫相对丰度的下降，显示为淡蓝色。对赤月照片和数据的分析显示，在其他发现中，金星有类似于地球喷流的赤道喷流。
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Why is Venus so different from Earth? To help find out, Japan launched the robotic Akatsuki spacecraft which entered orbit around Venus late in 2015 after an unplanned five-year adventure around the inner Solar System. Even though Akatsuki was past its original planned lifetime, the spacecraft and instruments were operating so well that much of its original mission was reinstated. Also known as the Venus Climate Orbiter, Akatsuki's instruments investigated unknowns about Earth's sister planet, including whether volcanoes are still active, whether lightning occurs in the dense atmosphere, and why wind speeds greatly exceed the planet's rotation speed. In the featured image taken by Akatsuki's UVI camera, the day-side of Venus is seen shown with planet-scale V-shaped cloud pattern. The image displays three ultraviolet colors and indicates a dip in the relative abundance of sulfur dioxide shown in faint blue. Analyses of Akatsuki images and data has shown, among other discoveries, that Venus has equatorial jet similar to Earth's jet stream.
© JAXA