| Cratère | Diamètre | Éponyme |
|---|---|---|
| Baade | 55 km | Walter Baade (1893-1960) |
| Babakin | 20 km | Georgij N. Babakin (1914-1971) |
| Babbage | 143 km | Charles Babbage (1792-1871) |
| Babcock | 99 km | Harold D. Babcock (1882-1968) |
| Back | 35 km | Ernst Emil Alexander Back (1881-1959) |
| Backlund | 75 km | Oskar Backlund (1846-1916) |
| Baco | 69 km | Roger Bacon (circa 1214-circa 1294) |
| Baillaud | 89 km | Benjamin Baillaud (1848-1934) |
| Bailly | 287 km | Jean Sylvain Bailly (1736-1793) |
| Baily | 26 km | Francis Baily (1774-1844) |
| Balandin | 12 km | Aleksei Aleksandrovich Balandin (1898-1967) |
| Balboa | 69 km | Vasco Núñez de Balboa (1475-1519) |
| Baldet | 55 km | Fernand Baldet (1885-1964) |
| Ball | 41 km | William Ball (1627-1690). |
| Balmer | 138 km | Johann Jakob Balmer (1825-1898) |
| Banachiewicz | 92 km | Tadeusz Banachiewicz (1882-1954) |
| Bancroft | 13 km | Wilder Dwight Bancroft (1867-1953) |
| Banting | 5 km | Frederick Banting (1891-1941) |
| Barbier | 66 km | Daniel Barbier (1907-1965) |
| Barkla | 42 km | Charles Glover Barkla (1877-1944) |
| Barnard | 105 km | Edward Emerson Barnard (1857-1923) |
| Barocius | 82 km | Francesco Barozzi (1537-1604) |
| Barringer | 68 km | Daniel Barringer (1860-1929) |
| Barrow | 92 km | Isaac Barrow (1630-1677) |
| Bartels | 55 km | Julius Bartels (1899-1964) |
| Bawa | 1 km | (prénom masculin africain) |
| Bayer | 47 km | Johann Bayer (1572-1625) |
| Beals | 48 km | Carlyle Smith Beals (1899-1979) |
| Beaumont | 53 km | Léonce Élie de Beaumont (1798-1874) |
| Becquerel | 65 km | Henri Becquerel (1852-1908) |
| Bečvář | 67 km | Antonin Becvar (1901-1965) |
| Beer | 9 km | Wilhelm Beer (1797-1850) |
| Behaim | 55 km | Martin Behaim (1459-1507) |
| Beijerinck | 70 km | Martinus Willem Beijerinck (1851-1931) |
| Beketov | 8 km | Nikolay Nikolayevich Beketov (1827-1911) |
| Béla | 11 km | (prénom féminin slave) |
| Bel'kovich | 214 km | Igor Vladimirovich Belkovich (1904-1949) |
| Bell | 86 km | Alexander Graham Bell (1847-1922) |
| Bellinsgauzen | 63 km | Fabian Gottlieb von Bellingshausen (1778-1852) |
| Bellot | 17 km | Joseph René Bellot (1826-1853) |
| Belopol'skiy | 59 km | Aristarkh Belopolsky (1854-1934) |
| Belyaev | 54 km | Pavel Ivanovich Belyaev (1925-1970) |
| Benedict | 14 km | Francis Gano Benedict (1870-1957) |
| Bergman | 21 km | Torbern Olof Bergman (1735-1784) |
| Bergstrand | 43 km | Carl Östen Emanuel Bergstrand (1873-1948) |
| Berkner | 86 km | Lloyd Viel Berkner (1905-1967) |
| Berlage | 92 km | Hendrik Petrus Berlage (1896-1968) |
| Bernoulli | 47 km | Jacques Bernoulli (1654-1705) |
| Jean Bernoulli (1667-1748) | ||
| Berosus | 74 km | Berosus le Chaldéen (? -circa 250 av. J.-C.) |
| Berzelius | 50 km | Jöns Jacob Berzelius (1779-1848) |
| Bessarion | 10 km | Johannes Bessarion (circa 1369-1472) |
| Bessel | 15 km | Friedrich Wilhelm Bessel (1784-1846) |
| Bettinus | 71 km | Mario Bettinus (1582-1657) |
| Bhabha | 64 km | Homi Jehangir Bhabha (1909-1966) |
| Bianchini | 38 km | Francesco Bianchini (1662-1729) |
| Biela | 76 km | Wilhelm von Biela (1782-1856) |
| Bilharz | 43 km | Theodore Maximilian Bilharz (1825-1862) |
| Billy | 45 km | Jacques de Billy (1602-1679) |
| Bingham | 33 km | Hiram Bingham (1875-1956) |
| Biot | 12 km | Jean-Baptiste Biot (1774-1862) |
| Birkeland | 82 km | Olaf Kristian Birkeland (1867-1917) |
| Birkhoff | 345 km | George D. Birkhoff (1884-1944) |
| Birmingham | 92 km | John Birmingham (1816-1884) |
| Birt | 16 km | William Radcliffe Birt (1804-1881) |
| Bjerknes | 48 km | Vilhelm Frimann Koren Bjerknes (1862-1951) |
| Black | 18 km | Joseph Black (1728-1799) |
| Blackett | 141 km | Patrick Maynard Stuart Blackett (1897-1974) |
| Blagg | 5 km | Mary Adela Blagg (1858-1944) |
| Blancanus | 117 km | Giuseppe Biancani (1566-1624) |
| Blanchard | 40 km | Jean-Pierre Blanchard (1753-1809) |
| Blanchinus | 61 km | Giovanni Bianchini (vivant en 1458) |
| Blazhko | 54 km | Sergei Nikolaevich Blazhko (1870-1956) |
| Bliss | 20 km | Nathaniel Bliss (1700-1764) |
| Bobillier | 6 km | Étienne Bobillier (1798-1840) |
| Bobone | 31 km | Jorge Bobone (1901-1958) |
| Bode | 18 km | Johann Elert Bode (1747-1826) |
| Boethius | 10 km | Boethius (c. 480-524) |
| Boguslawsky | 97 km | Palm Heinrich Ludwig von Boguslawsky (1789-1851) |
| Bohnenberger | 33 km | Johann Gottlieb Friedrich von Bohnenberger (1765-1831) |
| Bohr | 71 km | Niels H. D. Bohr (1885-1962) |
| Bok | 45 km | Priscilla Fairfield Bok (1896-1975) |
| Bart J. Bok (1906-1983) | ||
| Boltzmann | 76 km | Ludwig E. Boltzmann (1844-1906) |
| Bolyai | 135 km | Janos Bolyai (1802-1860) |
| Bombelli | 10 km | Raphaël Bombelli (1526-1572) |
| Bondarenko | 30 km | Valentin V. Bondarenko (1937-1961) |
| Bonpland | 60 km | Aimé Bonpland (1773-1858) |
| Boole | 63 km | George Boole (1815-1864) |
| Borda | 44 km | Jean-Charles de Borda (1733-1799) |
| Borel | 4 km | Émile Borel (1871-1956) |
| Boris | 10 km | (nom masculin russe) |
| Borman | 50 km | Frank Borman (1928-) |
| Born | 14 km | Max Born (1882-1970) |
| Boscovich | 46 km | Ruggiero Giuseppe Boscovich (1711-1787) |
| Bose | 91 km | Jagadish Chandra Bose (1858-1937) |
| Boss | 47 km | Lewis Boss (1846-1912) |
| Bouguer | 22 km | Pierre Bouguer (1698-1758) |
| Boussingault | 142 km | Jean-Baptiste Boussingault (1802-1887) |
| Bowditch | 40 km | Nathaniel Bowditch (1773-1848) |
| Bowen | 8 km | Ira Sprague Bowen (1898-1973) |
| Boyle | 57 km | Robert Boyle (1627-1691) |
| Brackett | 8 km | Frederick Sumner Brackett (1896-1988) |
| Bragg | 84 km | Sir William Henry Bragg (1862-1942) |
| Brashear | 55 km | Dr. John Alfred Brashear (1840-1920) |
| Brayley | 14 km | Edward William Brayley (1801-1870) |
| Bredikhin | 59 km | Fiodor Bredikhine (1831-1904) |
| Breislak | 49 km | Scipione Breislak (1748-1826) |
| Brenner | 97 km | Leo Brenner (1855-1928) |
| Brewster | 10 km | David Brewster (1781-1868) |
| Brianchon | 134 km | Charles Julien Brianchon (1783-1864) |
| Bridgman | 80 km | Percy Williams Bridgman (1882-1961) |
| Briggs | 37 km | Henry Briggs (1561-1630) |
| Brisbane | 44 km | Sir Thomas Brisbane (1770-1860) |
| Bronk | 64 km | Detlev Wulf Bronk (1897-1975) |
| Brouwer | 158 km | Dirk Brouwer (1902-1966) |
| Luitzen Egbertus Jan Brouwer (1881-1968) | ||
| Brown | 34 km | Ernest William Brown (1866-1938) |
| Bruce | 6 km | Catherine Wolfe Bruce (1816-1900) |
| Brunner | 53 km | William Otto Brunner (1878-1958) |
| Buch | 53 km | Christian Leopold von Buch (1774-1853) |
| Buffon | 106 km | Georges-Louis Leclerc, comte de Buffon (1707-1788) |
| Buisson | 56 km | Henri Buisson (1873-1944) |
| Bullialdus | 60 km | Ismaël Boulliau (1605-1694) |
| Bunsen | 52 km | Robert Bunsen (1811-1899) |
| Burckhardt | 56 km | Johann Karl Burckhardt (1773-1825) |
| Bürg | 39 km | Johann Tobias Bürg (1766-1834) |
| Burnham | 24 km | Sherburne Wesley Burnham (1838-1921) |
| Büsching | 52 km | Anton Friedrich Büsching (1724-1793) |
| Butlerov | 40 km | Aleksandr M. Butlerov (1828-1886) |
| Buys-Ballot | 55 km | Christoph Hendrik Diederik Buys Ballot (1817-1890) |
| Byrd | 93 km | Richard E. Byrd (1888-1957) |
| Byrgius | 87 km | Jost Bürgi (1552-1632) |