失联了46年的卫星，突然向地球传回信号，科学家却开始担忧1

A lost satellite, Lincoln Experimental Satellite 1 (LES1), resurfaced after 46 years, sending mysterious signals. Scientists worry about its sudden activation due to high-energy particle radiation, possibly revealing the increasing problem of space debris. The reappearance serves as a reminder of past incidents and raises concerns over safety in orbit.