His preliminary account of the parallax of Proxima Centauri was published in 1917, demonstrating that Proxima was the same distance from the Sun as the Alpha Centauri system.
Contul său preliminar al paralaxei de Proxima Centauri a fost publicat în 1917 , demonstrând că Proxima a fost la aceeași distanță de la Soare ca sistemul Alpha Centauri .