# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/jerome-lalande
# Generated: 2026-08-31T19:39:37.712Z

schema: https://schema.org/Person
url: "https://fame.am/person/jerome-lalande"
name: "Jérôme Lalande"
slug: "jerome-lalande"
description: "An 18th-century astronomer who pinned down one of the solar system's most elusive measurements: how far we actually are from the Sun."
tagline: "French astronomer (*1732 – †1807)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/J%C3%A9r%C3%B4me_de_La_Lande.jpg?width=1200"
gender: "male"
country:
  name: "France"
  isoCode: "FR"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1732-07-11"
deathDate: "1807-04-04"
livingStatus: "DECEASED"
scores:
  popularity:           56.65
  momentum:             10
  historical:           22.87607866666667
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "RISING"
ranks:
  global:   null
  country:  null
  category: null
tags:
  - name: "Scientists"
    slug: "scientists"
  - name: "Scientist"
    slug: "scientist"
  - name: "Astronomy"
    slug: "astronomy"
  - name: "Mathematics"
    slug: "mathematics"
  - name: "Literature"
    slug: "literature"
  - name: "France"
    slug: "france"
  - name: "Europe"
    slug: "europe"
  - name: "Early Modern Era"
    slug: "early-modern-era"
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    title: "ژروم لالاند"
    type:  "WIKIPEDIA"
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    title: "Жэром Лаланд"
    type:  "WIKIPEDIA"
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    title: "Jérôme Lalande"
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    title: "Jérôme Lalande"
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    title: "Ζερόμ Λαλάντ"
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    title: "Joseph Lalande"
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    title: "Jérôme Lalande"
    type:  "WIKIPEDIA"
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    title: "Joseph Jérôme Lefrançois de Lalande"
    type:  "WIKIPEDIA"
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    title: "ז'רום לאלנד"
    type:  "WIKIPEDIA"
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    title: "Jérôme Lalande"
    type:  "WIKIPEDIA"
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    type:  "WIKIPEDIA"
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    title: "جيروم لالاند"
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# bio (long form, separated for readability)
bio: |
  Joseph Jérôme Lefrançois de Lalande was born in France on 11 July 1732. He turned his attention to the stars and joined the freemasons, but his lasting mark came in 1769 when he used observations of Venus crossing the face of the Sun to calculate a precise value for the astronomical unit — the Earth-to-Sun distance that anchors our sense of cosmic scale. The work required exacting measurement and gave astronomers a yardstick for the solar system. He continued writing and observing until his death on 4 April 1807.