Notice: file_put_contents(): Write of 3820 bytes failed with errno=28 No space left on device in /var/www/tg-me/post.php on line 50

Warning: file_put_contents(): Only 4096 of 7916 bytes written, possibly out of free disk space in /var/www/tg-me/post.php on line 50
Solidot | Telegram Webview: solidot/26729 -
Telegram Group & Telegram Channel
天文学家首度确认海王星存在极光现象

2025-03-29 22:09 by 通灵师

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

#太空



tg-me.com/solidot/26729
Create:
Last Update:

天文学家首度确认海王星存在极光现象

2025-03-29 22:09 by 通灵师

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

#太空

BY Solidot


Warning: Undefined variable $i in /var/www/tg-me/post.php on line 283

Share with your friend now:
tg-me.com/solidot/26729

View MORE
Open in Telegram


Solidot Telegram | DID YOU KNOW?

Date: |

Tata Power whose core business is to generate, transmit and distribute electricity has made no money to investors in the last one decade. That is a big blunder considering it is one of the largest power generation companies in the country. One of the reasons is the company's huge debt levels which stood at ₹43,559 crore at the end of March 2021 compared to the company’s market capitalisation of ₹44,447 crore.

Should You Buy Bitcoin?

In general, many financial experts support their clients’ desire to buy cryptocurrency, but they don’t recommend it unless clients express interest. “The biggest concern for us is if someone wants to invest in crypto and the investment they choose doesn’t do well, and then all of a sudden they can’t send their kids to college,” says Ian Harvey, a certified financial planner (CFP) in New York City. “Then it wasn’t worth the risk.” The speculative nature of cryptocurrency leads some planners to recommend it for clients’ “side” investments. “Some call it a Vegas account,” says Scott Hammel, a CFP in Dallas. “Let’s keep this away from our real long-term perspective, make sure it doesn’t become too large a portion of your portfolio.” In a very real sense, Bitcoin is like a single stock, and advisors wouldn’t recommend putting a sizable part of your portfolio into any one company. At most, planners suggest putting no more than 1% to 10% into Bitcoin if you’re passionate about it. “If it was one stock, you would never allocate any significant portion of your portfolio to it,” Hammel says.

Solidot from us


Telegram Solidot
FROM USA