Independent HD 209458 b Transit Detection
Independently detects the transit of HD 209458 b with automated photometry.
Historical biography archive · Updated 2026-11-03
Gregory Henry Biography and Timeline
Follow Gregory Henry through 1 dated historical records for United States of America.
Gregory Henry, historical timeline
A chronological timeline drawn from matching World History Database records.
1Distinct records
1 of 1Page
1999–1999Years on this page
1999
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.