Walter Baade Georgi Babakin Charles Babbage Harold D. Babcock Ernst Emil Alexander Back Oskar Backlund Roger Bacon Benjamin Baillaud Jean Sylvain Bailly Francis Baily Ibn Bajjah Aleksei Balandin Vasco Núñez de Balboa Fernand Baldet William Ball Johann Jakob Balmer Tadeusz Banachiewicz Wilder Dwight Bancroft Frederick Banting Charles Glover Barkla Edward Emerson Barnard Francesco Barozzi Daniel Barringer Muhammad ibn Jābir al-Harrānī al-Battānī Ibn Battuta Johann Bayer Antonín Bečvář Wilhelm Beer Torbern Bergman Friedrich Wilhelm Bessel Nur Ed-Din Al Betrugi Giuseppe Biancani Francesco Bianchini - Bianchini crater north of Sinus Iridium Giovanni Bianchini - Blanchinus crater - Southern Hemisphere Wilhelm von Biela Jacques de Billy Hiram Bingham III Abū Rayhān al-Bīrūnī Mary Adela Blagg Étienne Bobillier Johann Elert Bode Niels Bohr Priscilla Fairfield Bok János Bolyai George Phillips Bond - named for G. Bond crater Aimé Bonpland Émile Borel Roger Joseph Boscovich (or Rudjer Bošković) Ira S. Bowen Frederick Sumner Brackett Tycho Brahe Edward William Brayley Sir David Brewster Catherine Wolfe Bruce Giordano Bruno Henri Buisson Johann Tobias Bürg Joost Bürgi Sherburne Wesley Burnham Richard Evelyn Byrd