jasonj

It doesn't matter what kind of radiation, but any kind of detector has to have a physical connection with any particle stated or reaction of that particle. The fact that it's being observed can change it's direction and function. No tools needed. Uncertainty principle. Even thinking about it will change your results.

would it be possible to look back at the earth through refracting of gravitational lensing. I'm not part of the scientific community, but I'd like to know if that's possible in any way. With all the massive gravitational fields in this galaxy maybe it could be a possibility to see a picture of the planet millenia ago?