Lassell

Lassell is a surname of English origin. In scholarly and encyclopedic usage, it is most closely associated with William Lassell, a 19th-century English astronomer and instrument maker who contributed to the study of the outer planets and their satellites.

William Lassell (1799–1880) was an English astronomer known for building and operating large reflecting telescopes and for his observational work during the mid-19th century. He pursued studies of the outer solar system, focusing on the planets and their moons, and his efforts helped advance telescopic observing and the discovery and analysis of planetary satellites. His work reflects the era’s emphasis on improving instrumentation to push the boundaries of planetary astronomy.

The name Lassell also appears in lunar nomenclature. The Lassell crater on the Moon is named in honor of William Lassell, recognizing his contributions to observational astronomy. The crater is one of several features named for 19th-century astronomers to commemorate early instrumental and observational advances in the field.

Beyond these references, Lassell as a surname has limited widespread usage in contemporary contexts. The name remains primarily noted for its historical connection to William Lassell and his impact on telescope technology and planetary observation.