James Webb allows us to see stars as they were thousands of years ago. So what about seeing Earth of 37 years ago.
For nostalgic purposes I’d like to watch myself aged 12 in 1985, perhaps outside on Christmas Day playing on my new BMX bike.
Presumably to see the light from 37 years ago, said telescope would need to be 37 light years away.
But how could this theoretically be possible? Please discuss the speed of travel, size of telescope, and any problems with the theory.