A gravitational lens, as predicted by Einstein general theory of relativity, is a distribution of matter or a point particle between a distant light source…
View More SMACS J0723.3-7327 Galaxy Cluster: Gravitational Lenses羞龍天文摄影 Xiulong Astrophotography
Xiulong Tianwen Sheying – Astrophotography by 羞龍Xiulong Stefano Zamblera