David F. GrayDavid F. Gray is a Professor Emeritus of Astronomy at Western University, London, Ontario, Canada, where he has held positions since 1966. He was president of IAU Commission 36, on the Theory of Stellar Atmospheres 1988–1991, and served on the observing-time allocation panels of the Hubble Space Telescope and the Canada–France–Hawaii telescope. He is a member of the Canadian Astronomical Society, the International Astronomical Union, Sigma Xi Honorary Society, and the American Astronomical Society, and has served on numerous organizing committees for astronomical symposia. He was an invited lecturer at the Canary Islands Winter School of Astrophysics, the Catania Observatory, and the Beijing Observatory. Read More Read Less