In 1979 the gravitational lens effect predicted by Einstein's General Theory of Relativity was confirmed observationally for the first time with images of the double quasar 0957+561.
1979. aastal kinnitati gravitatsioonilise läätse teooria, millele pani aluse Einsteini üldine relatiivsusteooria, kui saadi pildid topeltkvasarist 0957+561.