Musk's SpaceX applies to launch a million satellites into orbit
H.P. Lovecraft – The Call of Cthulhu
。safew官方版本下载对此有专业解读
尤其值得注意的是，部分名校的博士招生规模，更是大幅提高，如北京大学博士招生规模超过4000人，清华大学博士招生规模超过4500人，上海交大、浙江大学博士招生规模达到5000人。这一方面会影响本校的博士招生门槛，另一方面也会影响申请其他高校的博士生源质量。可以说，有一些处在985中游的高校，来申请读博的博士生，很大一部分都是2015年时根本没有希望被录取的学生。加上我国在2010年后，硕士研究生也大幅扩招，部分高校因培养规模大，缺乏对硕士培养质量的严格把关，博士生源质量能不下降吗？
For over $1 million pic.twitter.com/1FdxoNM2ov
There is a plan to prevent such a strike—the Space Surveillance Network, a bevy of sensors that the military uses to track space debris. NASA monitors what’s unofficially known as the “pizza box,” a sort of no-fly zone around the ISS. When pieces of debris are predicted to enter the box—if there’s at least a 1 in 100,000 chance of collision—mission controllers order avoidance maneuvers, firing thrusters that move the ISS and dodge the trash. The technique has been used dozens of times since the first ISS module launched in 1998. But the system only tracks about 45,000 larger pieces, and all sensors have noise. Plus, risk thresholds can miss stuff, sometimes badly. In 2025, Chinese astronauts were briefly stranded at their station after debris hit their return vehicle.