Who discovered the first planet outside the Solar System?

A. Wolszczan and Dale Frail
G. Cassini
E. Hubble
no such planets were discovered
Aleksander Wolszczan (born 29 April 1946 in Szczecinek, Poland) is a Polish astronomer. He is the co-discoverer of the first extrasolar planets and pulsar planets.
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A. Wolszczan and Dale Frail
G. Cassini
E. Hubble
no such planets were discovered
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