Ara
Friedrich wilhelm bessel
/fɹˈiːdɹɪtʃ wˈɪlhɛlm bˈɛsəl/
/fɹˈiːdɹɪtʃ wˈɪlhɛlm bˈɛsəl/Friedrich wilhelm bessel
01
German mathematician and astronomer who made accurate measurements of stellar distances and who predicted the existence on an 8th planet (1784-1846)
