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天文学家首度确认海王星上存在极光现象，由 NASA 韦伯太空望远镜所发现，补上了太阳系四颗巨行星极光观测的最后一块拼图。这也是我们首次直接捕捉到这颗最远行星的极光辉光与光谱特征。海王星位于太阳系边缘，距离太阳约45亿公里，是一颗冰冷巨行星。自 1989 年航海家二号飞掠海王星后，这颗遥远行星便再无太空船造访。如今韦伯太空望远镜首度捕捉到海王星上明亮的极光活动。这项突破得益于韦伯望远镜优异的近红外灵敏度，不仅能拍下极光发出的辉光，还能透过光谱清楚辨识代表极光活动的重要指标：三氢阳离子（H₃⁺）。这种离子也曾在木星、土星与天王星的极光中被侦测到，被视为气体行星极光的重要证据。与地球或木星不同，海王星的极光并不集中于南北极，而是分布在行星的中纬度地区。这是因为海王星具有异常倾斜的磁场结构，其磁轴与自转轴倾斜达 47 度，这一特征最早由航海家二号所发现。 天文館:首度捕捉到海王星極光 NASA's Webb Captures Neptune's Auroras For First Time
天文学家首度确认海王星上存在极光现象，由 NASA 韦伯太空望远镜所发现，补上了太阳系四颗巨行星极光观测的最后一块拼图。这也是我们首次直接捕捉到这颗最远行星的极光辉光与光谱特征。海王星位于太阳系边缘，距离太阳约45亿公里，是一颗冰冷巨行星。自 1989 年航海家二号飞掠海王星后，这颗遥远行星便再无太空船造访。如今韦伯太空望远镜首度捕捉到海王星上明亮的极光活动。这项突破得益于韦伯望远镜优异的近红外灵敏度，不仅能拍下极光发出的辉光，还能透过光谱清楚辨识代表极光活动的重要指标：三氢阳离子（H₃⁺）。这种离子也曾在木星、土星与天王星的极光中被侦测到，被视为气体行星极光的重要证据。与地球或木星不同，海王星的极光并不集中于南北极，而是分布在行星的中纬度地区。这是因为海王星具有异常倾斜的磁场结构，其磁轴与自转轴倾斜达 47 度，这一特征最早由航海家二号所发现。 天文館:首度捕捉到海王星極光 NASA's Webb Captures Neptune's Auroras For First Time
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The STAR Market, as is implied by the name, is heavily geared toward smaller innovative tech companies, in particular those engaged in strategically important fields, such as biopharmaceuticals, 5G technology, semiconductors, and new energy. The STAR Market currently has 340 listed securities. The STAR Market is seen as important for China’s high-tech and emerging industries, providing a space for smaller companies to raise capital in China. This is especially significant for technology companies that may be viewed with suspicion on overseas stock exchanges.
Can I mute a Telegram group?
In recent times, Telegram has gained a lot of popularity because of the controversy over WhatsApp’s new privacy policy. In January 2021, Telegram was the most downloaded app worldwide and crossed 500 million monthly active users. And with so many active users on the app, people might get messages in bulk from a group or a channel that can be a little irritating. So to get rid of the same, you can mute groups, chats, and channels on Telegram just like WhatsApp. You can mute notifications for one hour, eight hours, or two days, or you can disable notifications forever.
