フォーマルハウトb
Graham was involved in another first in 2008, when he was a member of the team that announced the detection of Fomalhaut b, the first exoplanet detected in visible light. Graham had first used the Hubble Space Telescope to take images of the debris disk around Fomalhaut in 2004, and from the structure of the disk, he and his team inferred the presence of a planet. Follow-up observations of the disk showed that a tiny speck of light at the inner edge of the disk was moving in orbit about Fomalhaut, as predicted.