Question

Role of earth in detcting very high energy gamma rays

Answer 1

Supernova remnants are basically leftovers of massive stars that ended their lives in huge explosions called supernovae. Astronomers generally distinguish three types of SNRs, one of which is the composite SNR—these having rapidly expanding shells from the supernova blast wave accompanied by wind nebulae powered by young pulsars formed in the explosions.

Actually, earth doesn't play any role in it because it can be detected any where in universe but on  earth, it passes around like wave and give a wider view of it.