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- 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).
www.britannica.com › biography › William-LassellWilliam Lassell | Astro-Engineer, Telescope Maker & Discoverer
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William Lassell 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). Lassell started a brewery business about.
Jan 1, 1988 · In spite of the many thousands of pounds which he spent on the building of three major astronomical telescopes, he was able to bequeath an estate valued at between 0-80,000 at his death in 1880, 10 and by his late thirties, had accumulated sufficient capital to leave his house at 18, Norton Street, in Liverpool's business district, where he had ...
- Allan Chapman
- 1988
believe that William Lassell’s significance derives from the fact that he was the man who, more than any other, carried on the physical astronomy tradition from Herschel, and recognized the role of the large reflecting telescope within it.”
- Neil English
- 2018
Though accomplished and famous astronomers would call Lassell an amateur, he is known for several discoveries, namely, the moons of Neptune, Saturn, and Uranus. Yes, he discovered Neptune’s Triton; Saturn’s Hyperion; and Uranus’ Ariel and Umbriel.
- William Lassell – Early Years
- The Moons of Saturn, Uranus, and Neptune
- Uranus’ Moons
- Later Years
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...
Jun 18, 2019 · William Lassell, an English amateur astronomer and telescope maker, was born June 18, 1799. Lassell made a substantial fortune as a brewer of beer, which he sold to the thirsty factory workers of Liverpool, and then used his income to build several fine reflecting telescopes, with mirrors that he ground himself.
May 22, 2021 · William Lassell, one of the foremost British astronomers of the nineteenth century, rose to fame during the months after the telescopic finding by discovering Triton, Neptune’s chief moon—important for calculating the planet’s mass and its influence on Uranus.
