bessel


< /ˈfri drɪk ˈwɪl hɛlm; German ˈfri drɪx ˈvɪl hɛlm/, 1784–1846, German astronomer.

noun

  1. Friedrich Wilhelm (ˈfriːdrɪç ˈvɪlhɛlm). 1784–1846, German astronomer and mathematician. He made the first authenticated measurement of a star’s distance (1841) and systematized a series of mathematical functions used in physics

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