Gulielmus Lassell
Gulielmus Lassell (Boltonii die 18 Iunii 1799 natus; mortuus ad Maidenhead die 5 Octobris 1880), a principio braxator Anglicus, fuit postea astronomus]. Telescopium duorum pedum (viginti quattuor unciarum), eo aevo maximum, ad suum usum perfecit. Die 10 Octobris 1846 lunam maximam Neptuni Tritonem invenit. Ariel et Umbriel, Urani satellites, ab eo anno 1851 inventi sunt.

Bibliographia 
 "The Late Mr. Lassell" in  Astronomical Register vol. 18 (1880) pp. 284–285
 "William Lassell" in Monthly Notices of the Royal Astronomical Society vol. 41 (1881) pp. 188–191
 J. F. W. Herschel, "An Address delivered at the Annual General Meeting of the Society, February 9, 1849, on presenting the Honorary Medal to William Lassell" in Memoirs of the Royal Astronomical Society vol. 18 (1850) pp. 192-200
 Margaret Lindsay Huggins, "The late Mr. William Lassell, LL.D., F.R.S." in The Observatory vol. 3 no. 43 (1880) pp. 587–590
 Robert W. Smith, "William Lassell and the Discovery of Neptune" in Journal for the History of Astronomy vol. 14 (1983) pp. 30–32
 Robert W. Smith, Richard Baum, "William Lassell and the Ring of Neptune: a Case Study in Instrumental Failure" in Journal for the History of Astronomy vol. 15 (1984) pp. 1–17

Nexus externi 

Physici Britanniae
Astronomi Britanniae