PlanetPol is a ground based, high sensitivity polarimeter based at the William Herschel Telescope.
This happened again in 2000–2001, when it was observed (by the William Herschel Telescope) to have cooled from 7,000K to 4,250K in the course of a few months.
In 1995, he initiated a project with R. Bacon and R. Davies to build SAURON, a panoramic integral-field spectrograph for the 4.2-m William Herschel Telescope (WHT).
William Shakespeare | William Laud | William Blake | William | William III of England | William Morris | William McKinley | William Howard Taft | William Ewart Gladstone | William the Conqueror | William S. Burroughs | William Shatner | William Faulkner | William Randolph Hearst | William Wordsworth | William Tecumseh Sherman | William Hogarth | Prince William, Duke of Cambridge | William Penn | William Jennings Bryan | William Gibson | William Wilberforce | William James | William Makepeace Thackeray | Hubble Space Telescope | Fort William | William Hanna | William Hague | William III | William Hurt |