On April 10 2019 it has been announced and published .that NASA and bunch of other countries using their radio telescope .on different regions in the earth. Made a telescope having lens in size of earth .. black was captured on the telescope.. which send a Einstein wave through physics community .. it is clear from that Einstein prediction about blackhole is right . They really exist...
And in the orbit of photon can be seen easily from this pic
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From @siddharthrout