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William Lassell (Bolton, 18 de junho de 1799 — Maidenhead, 5 de outubro de 1880) foi um comerciante e astrônomo inglês. Ele é lembrado por suas melhorias no telescópio refletor e suas descobertas subsequentes de quatro satélites planetários.
William Lassell FRS FRSE FRSL FRAS (18 June 1799 – 5 October 1880) was an English merchant and astronomer. He is remembered for his improvements to the reflecting telescope and his ensuing discoveries of four planetary satellites.
William Lassell (born June 18, 1799, Bolton, Lancashire, Eng.—died Oct. 5, 1880, Maidenhead, Berkshire) was an amateur English astronomer who discovered Ariel and Umbriel, satellites of Uranus; and Triton, a satellite of Neptune. He also discovered a satellite of Saturn, Hyperion (also discovered independently by William Bond and George Bond).
- The Editors of Encyclopaedia Britannica
1 de jan. de 1988 · One never ceases to William Lassell (1799-1880) 361 admire the controls which Lassell placed upon his work, and how he saw his task as faithfully describing astronomical objects and nothing more. Much of Lassell's historical significance stems from the type of astronomer that he was, how his interests developed, and how the resources ...
- Allan Chapman
- 1988
- William Lassell – Early Years
- The Moons of Saturn, Uranus, and Neptune
- Uranus’ Moons
- Later Years
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William Lassell was born in Bolton, Lancashire, UK, and educated in Rochdale Academy. He was apprenticed to a merchant in Liverpool and later became a beer brewer and hobby astronomer. Lassell built himself an observatory in West Derby, a suburb of Liverpool with a 610 mm reflector telescope for which he pioneered the use of an equatorial mount for...
Already in 1846, William Lassell discovered the largest moon of Neptune, Triton, 17 days after the discovery of Neptune itself by Johann Gottfried Galle. Two years later, independently co-discovered Hyperion, a moon of Saturn. Both Ariel and the slightly larger Uranian satellite Umbriel were discovered by William Lassell on 24 October 1851. Althoug...
In total, Uranus has 27 known natural satellites and along with Ariel and Umbriel, Miranda, Titania, and Oberon belong to the five main satellites. The Uranian satellite system is the least massive among those of the giant planets and it is believed that the combined mass of Uranus’ five major satellites would be less than half that of Triton, the ...
When the British Queen Victoriavisited Liverpool in 1851, Lassell was the only personality she specifically asked to meet. In 1855, he built a 120-cm telescope, which he installed on the island of Malta for better observing conditions. In 1849 Lassell was awarded the Gold Medal of the Royal Astronomical Society. In 1858 he was awarded the Royal Med...
Learn about the life and achievements of William Lassell, an English merchant and astronomer who discovered Ariel, Umbriel, Triton and Hyperion. Find out how he built his own telescopes, named the moons after Shakespeare and Pope, and met Queen Victoria.
28 de set. de 2021 · Por várias noites, James Challis e William Lassell, os astrônomos designados por Airy, vasculharam as regiões do céu apontadas por Adams procurando algum astro que não estivesse nos mapas celestes, e que poderia ser o oitavo planeta.
22 de mai. de 2021 · Learn how William Lassell, a self-taught astronomer and telescope maker, found Triton, Neptune's largest satellite, in 1846. Explore his observations, instruments, and the controversy over Neptune's alleged ring system.
