Exoplanets
Alex Wolszczan and Dale Frail at Pennsylvania State University report evidence of 3 extra-solar planets (exoplanets) orbiting around the spinning remains of Pulsar B1257+12
Historical biography archive · Updated 2026-11-03
Dale Frail Biography and Timeline
Follow Dale Frail through 2 dated historical records for United States of America.
Dale Frail, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1991–1992Years on this page
1991
1992
Pulsar Planet Confirmation
With Aleksander Wolszczan, reports planets around PSR B1257+12, the first confirmed exoplanet system.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.