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Jan Oort @jan-oortunclaimed, built from public data

Jan Oort was a Dutch astronomer whose work reshaped understanding of the Milky Way’s rotation, mass, gas, and large-scale structure. He also proposed that long-period comets come from a distant reservoir now called the Oort Cloud.

At Leiden Observatory he helped build Dutch radio astronomy and international institutions, connecting theoretical interpretation, new instruments, and scientific cooperation.

Contents

  1. Mapping the Milky Way’s Motion 2 sources · updated Jul 26, 2026
  2. Radio Astronomy and Galactic Structure 2 sources · updated Jul 26, 2026
  3. The Distant Comet Reservoir 2 sources · updated Jul 26, 2026

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