# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/william-lassell
# Generated: 2026-08-14T06:42:40.256Z

schema: https://schema.org/Person
url: "https://fame.am/person/william-lassell"
name: "William Lassell"
slug: "william-lassell"
description: "A brewer by trade who ground his own telescope mirrors and found moons no one else could see — four of them, orbiting Neptune, Uranus, and Saturn."
tagline: "English merchant and astronomer (1799–1880)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/William_Lassell.jpg"
gender: "male"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1799-06-18"
deathDate: "1880-10-05"
livingStatus: "DECEASED"
scores:
  popularity:           52.95
  momentum:             0
  historical:           21.841328
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  60
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
tags:
  - name: "Scientists"
    slug: "scientists"
  - name: "Scientist"
    slug: "scientist"
  - name: "Astronomy"
    slug: "astronomy"
  - name: "Physics"
    slug: "physics"
  - name: "19th Century"
    slug: "19th-century"
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    title: "Уільям Ласел"
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    title: "William Lassell"
    type:  "WIKIPEDIA"
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    title: "William Lassell"
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    title: "William Lassell"
    type:  "WIKIPEDIA"
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    title: "William Lassell"
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    title: "William Lassell"
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    title: "William Lassell"
    type:  "WIKIPEDIA"
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    title: "William Lassell"
    type:  "WIKIPEDIA"
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    title: "William Lassell"
    type:  "WIKIPEDIA"
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    title: "William Lassell"
    type:  "WIKIPEDIA"
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    title: "William Lassell"
    type:  "WIKIPEDIA"
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# bio (long form, separated for readability)
bio: |
  William Lassell was born on 18 June 1799 in England and made his living as a merchant, but his real work happened at night. He refined the design of the reflecting telescope, crafting optics sharp enough to pull faint objects from the dark. That precision paid off: he discovered four planetary satellites that had eluded every astronomer before him, circling the outer giants of the solar system. His finds expanded the known architecture of the planets at a time when each new moon redrew the map. He died on 5 October 1880, having seen farther than his tools were supposed to allow.