阿凡达
国际空间站掉下来的垃圾,把人家房子砸了个窟窿?!_我的网站

一 | Dhaka, Oct 11 (UNI) China wants to implement the Teesta master plan. Chinese Ambassador Li Ziming visited the Teesta Barrage and said this on Sunday.
On October 10, Ambassador Li Jiming called on Mr. Md. Sabirul Islam, Divisional Commissioner of Rangpur, and Mr. Md. Asif Ahasan, Deputy Commissioner of Rangpur District. Ambassador Li also met with local officials and engineers of Bangladesh Water Development Board.
China wants to lend a billion dollars to this project as a sponsor. China will implement the Teesta Master Plan through its people with loans. This project will include river mining, char mining, construction of satellite cities on both sides, solar power projects, naval terminals and many other things.
But experts say the project will be a white elephant with Chinese loan money. Bangladesh will get stuck in the net of Chinese debt. The way China trapped Sri Lanka, Pakistan in debt net.
International water expert, Lock Haven University professor Dr. Md. Khalekuzzaman has been calling this project ambitious and anti-nature since the beginning. He thinks that if this project is implemented, more terrible disaster will occur in the northern region including Tistapar.
Experts say, canceling the claim of fair share of Teesta river water with India, if this master plan is taken internally, India's unilateral control over Teesta will be recognized. India will no longer want to give water. It would be a suicidal decision.
China's debt trap on the other hand gives India control of the Teesta. A powerful syndicate wants to collect China's debt to Bangladesh. What could be the reason, everyone more or less knows what happens in projects in the name of river dredging.
Bangladeshi media personality Shankar Maitra told UNI, “This project needs more thought and research by the country's scientists and experts. One must also wonder why China has stepped up to give loans to the unprofitable sector. We also know what happens in the name of river mining, how corruption happens in the name of protecting dams”.
He said, "I think India must give its fair share of Teesta water to Bangladesh. This demand cannot be withdrawn".
Dhaka University Professor Major Nazmul Ahsan Kalimullah said, India is in great danger. The chicken neck in the Seven Sisters issue may be out of India's hands.
He said, "India has brought its own danger.
As a result of the tug of war between the Central Government of India and the provincial governments on the Teesta issue, Bangladesh has also withdrawn from the Teesta, while China has missed this opportunity. Bangladesh has waited for a long time.
He said, "We do not digest water?" Is our production stopped? Our hilsa fish production has collapsed? Certainly not.
UNI MAZ GNK。

二 | 可惜黑格并没有按时到达空间站。

三 |
但问题是,第一批锂离子电池已经由日本的HTV货运飞船运送至了国际空间站。原本的计划是,被这一批锂离子电池替换的旧镍氢电池,用同一艘HTV货运飞船带走。但由于黑格没能登上空间站,NASA只好暂时取消此次换电池的太空行走任务,将锂离子电池留在空间站,等待下一个能执行该任务的宇航员到来。这艘HTV货运飞船也只能直接离开,并未带上镍氢电池。由于每艘飞船的载货量都是固定的,所以HTV货运飞船没办法一次性带走两倍数量的旧电池。于是,随后每一次HTV货运飞船运来新一批的锂离子电池,都会带走上一批替换下来的旧镍氢电池,直到2020年最后一艘HTV货运飞船离开国际空间站。但这时,空间站上还剩下最后一批镍氢电池没有带走。
四 | 这个装有九块旧镍氢电池的货物托盘,编号为EP9,总重量相当于一辆大型SUV。

五 | 换句话说,只有HTV货运飞船,才能运走EP9,但HTV已经不会再来了。
国际空间站的每寸空间都很宝贵,EP9这样的大物件,自然不能一直留在空间站上。于是NASA做了一个决定,它们计划直接丢掉EP9——这也是国际空间站丢弃过的最大太空垃圾(space debris)。2021年3月11日,当国际空间站运行至中美洲以西太平洋上空约418千米处时, NASA的地面控制人员操控国际空间站上的机械臂,将EP9从空间站上释放,丢入了太空。当时NASA表示,EP9将会绕地球漂浮2至3年,然后坠入大气层,并在其中完全燃烧。空间站丢弃EP9
六 | 通过分析该物体的尺寸、特征和材料,并将其与EP9上的硬件相对比,NASA最终确定,该物体是EP9上的一根支柱,用于将电池固定在货物托盘上,由铬镍铁合金制成,重 0.7kg,10cm,直径 4cm。
该物体与完好支柱对比
七 |
ESA表示,大约每一周就会有一个较大的空间物体通过大气层冲入地球,不过大部分碎片在到达地面之前就已经完全燃烧了。大多数航天器、运载火箭和运行硬件的设计都是为了尽量让其在大气层中完全燃烧,从而降低相关风险。但此次EP9事件告诉我们,太空垃圾也可能会威胁地面。事实上,这已经不是第一次太空垃圾砸向地面,并威胁人身安全的事件了。据《纽约时报》(The New York Times)报道,1969年,苏联航天器的碎片击中了西伯利亚海岸附近的一艘日本小船,造成 5 人受伤。
八 | 据福克斯新闻
(Fox News)、ABC新闻(ABC News)等多家媒体报道,1997年,美国俄克拉荷马州的一位居民也曾被火箭的碎片击中过肩膀。不过,大家也不用过于恐慌,毕竟被太空垃圾击中的概率非常非常小,而且世界各国也在积极尝试太空垃圾的清理办法,如英国2018年就开始部署“清除碎片”系统,相信未来我们可以还太空一个干净的环境。Current article:http://lrp19z.shuosongzoutunchutao.cfd/list_fqm7cx3/boh.html
Published on:11:53:08
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