This well detailed. Einstein is marvel to the 19th century generation till date. in my undergraduate days, i did a work on black hole and was in awe of general relativity. The field equations, the formation of black hole from dwarf planet to neutron star is just amazing. you have come across gravity light, is is a product of this theory. The special relativity defiled intuition. i was glad for this noble prize recipient, it so points to Einstein.