Board Thread:General Discussion/@comment-39676427-20190602162723/@comment-27794543-20190603081642

Yeah... basically the explanation is radiation. The left over radiation prevents instruments from being able to monitor Earth, including super-duper telescopes. I don't know how scientifically sound that is. Honestly, you'd think they'd send a probe down to Earth instead of a hundred juveniles, but that's the basic premise of the show.