Working with Dale Frail, Wolszczan carried out astronomical observations from the Arecibo Observatory in Puerto Rico which led them to the discovery of the pulsar PSR B1257+12 in 1990.
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This was the first confirmed discovery of planets outside the Solar System (over seven hundred are known today).
Aleksander Kwaśniewski | Aleksander Szenajch | Aleksander Hall | Aleksander Zelwerowicz State Theatre Academy | Aleksander Griboyedov | Aleksander Ford | Aleksander Chodźko | Aleksander Bardini | Grant Aleksander | Edward Aleksander Raczyński | Aleksander Wolszczan | Aleksander Serov | Aleksander Saharov | Aleksander Prystor | Aleksander Michał Sapieha | Aleksander Krupa | Aleksander Kotsis | Aleksander Ignacy Lubomirski | Aleksander Glondys | Aleksander Fredro | Aleksander Denstad With | Aleksander Chodkiewicz | Aleksander Barkov, Sr. | Aleksander Barkov, Jr. |
Since its creation, the Institute has included some 1,500 scholars and artists, including Zbigniew Brzeziński, Jan Henryk De Rosen, Stanisław Skrowaczewski, Aleksander Wolszczan, Hilary Koprowski, Waclaw Szybalski, Michael Novak, Bohdan Pawłowicz and Nobel Prize winners Roald Hoffmann, Czesław Miłosz and Frank Wilczek.