Gregory W. Henry

{{short description|American astronomer}}{{More refs|date=November 2024}}

Gregory W. Henry is an astronomer and research scientist for Tennessee State University. In 1999, Henry led one of two teams that discovered the first transiting extrasolar planet, HD 209458 b.{{Cite web |title=Dr. Gregory Henry |url=http://coe.tsuniv.edu/Henry.html# |access-date=2024-11-04 |website=coe.tsuniv.edu}}{{Cite web |date=2010-08-06 |title=It's Real! - NASA Science |url=https://science.nasa.gov/science-news/science-at-nasa/1999/ast14nov99_1/ |archive-url=https://web.archive.org/web/20100806070042/https://science.nasa.gov/science-news/science-at-nasa/1999/ast14nov99_1/ |archive-date=2010-08-06 |access-date=2024-11-04 |website=NASA}} The other team was led by David Charbonneau.

Henry was also involved in the discovery of HD 149026 b.