Editing List of astronomers (section)

===M===
{{columns-list|colwidth=25em|
*[[Mahendra Suri]] (India, 14th century CE)
*[[Ma Yize]] (China, 910–1005)
*[[Adriaan van Maanen]] (United States, 1884–1946)
*[[George Parker, 2nd Earl of Macclesfield]] (United Kingdom, {{circa|1697}}–1764)
*[[Johann Heinrich von Mädler]] (Germany, 1794-1874)
*[[Amy Mainzer]] (United States, 1974–)
*[[Steve Mandel]] (United States)
*[[Geoff Marcy]] (United States, 1954–)
*[[Simon Marius]] (Germany, 1573–1624)
*[[Brian G. Marsden]] (United States, 1937–2010)
*[[Albert Marth]] (Germany, 1828–1897)
*[[Nevil Maskelyne]] (United Kingdom, 1732–1811)
*[[Charles Mason]] (United Kingdom, United States, 1730–1787)
*[[John C. Mather]] (United States, 1946–)
*[[Janet Akyüz Mattei]] ([[Turkey]]/United States, 1943–2004)
*[[Edward Walter Maunder]] (United Kingdom, 1851–1928)
*[[Pierre Louis Maupertuis]] (France, 1698–1759)
*[[Alain Maury]] (France, 1958–)
*[[Antonia Maury]] (United States, 1866–1952)
*[[Matthew Fontaine Maury]] (United States, 1806–1873)
*[[Brian May]] (United Kingdom, 1947–)
*[[Cornell Mayer]] (United States, 1922–2005)
*[[Tobias Mayer]] (Germany, 1723–1762)
*[[Michel Mayor]] (Switzerland, 1942–)
*[[Christopher McKee]] (United States, 1942–)
*[[Robert S. McMillan (astronomer)|Robert S. McMillan]] (United States)
*[[William H. McCrea]] (United Kingdom, 1904–1999)
*[[Bruce A. McIntosh]] (Canada, 1929–2015)
*[[Robert H. McNaught]] (Australia, 1956–)
*[[Pierre Méchain]] (France, 1744–1804)
*[[Thebe Medupe]] ([[South Africa]], 1973–)
*[[Karen Jean Meech]] (United States, 1956–)
*[[Aden Meinel|Aden Baker Meinel]] (United States, 1922–2011)
*[[Marjorie Meinel|Marjorie Pettit Meinel]] (United States, 1922–2008)
*[[Fulvio Melia]] (United States, 1956–)
*[[Philibert Jacques Melotte]] (United Kingdom, 1880–1961)
*[[Paul Merrill|Paul Willard Merrill]] (United States, 1887–1961)
*[[David Merritt]] (United States)
*[[Charles Messier]] (France, 1730–1817)
*[[Joel Hastings Metcalf]] (United States, 1866–1925)
*[[Andreas Gerasimos Michalitsianos]] (United States, 1947–1997)
*[[John Michell]] (United Kingdom, 1724–1793)
*[[Elia Millosevich]] (Italy, 1848–1919)
*[[Edward Arthur Milne]] (United Kingdom, 1896–1950)
*[[Rudolph Minkowski]] (Germany, 1895–1976)
*[[Marcel Minnaert|Marcel Gilles Jozef Minnaert]] (Belgium, Netherlands, 1893–1970)
*[[Maria Mitchell]] (United States, 1818–1889)
*[[Seidai Miyasaka]] (Japan, 1955–)
*[[Yoshikane Mizuno]] (Japan, 1954–)
*[[August Ferdinand Möbius]] (Germany, 1790–1868)
*[[Anthony Moffat]] (Canada)
*[[Johan Maurits Mohr]] (Netherlands, 1716–1775)
*[[Samuel Molyneux]] (United Kingdom, 1689–1728)
*[[Geminiano Montanari]] (Italy, 1633–1687)
*[[Patrick Moore]] (United Kingdom, 1923–2012)
*[[James Michael Moran]] (United States, 1943–)
*[[William Wilson Morgan]] (United States, 1906–1994)
*[[Hiroshi Mori (astronomer)|Hiroshi Mori]] (Japan, 1958–)
*[[Amédée Mouchez]] (France, 1821–1892)
*[[Antonín Mrkos]] (Czechoslovakia, 1918–1996)
*[[Jean Mueller]] (United States, 1950–)
*[[Masaru Mukai]] (Japan, 1949–)
*[[Christiaan Alexander Muller]] (Netherlands, 1923-2004)
*[[Gustav Müller (astronomer)|Gustav Müller]] (Germany, 1851–1925)
*[[Regiomontanus|Johannes Müller]] (Germany, 1436–1476)
*[[Harutaro Murakami]] (Japan, 1872–1947)
*[[Osamu Muramatsu]] (Japan, 1949–)
*[[Ahmad bin Musa|bin Musa, Ahmad]] (Persia, 805–873)
*[[Hasan bin Musa|bin Musa, Hasan]] (Persia, 810–873)
*[[Muhammad bin Musa|bin Musa, Muhammad]] (Persia, (800–873)
*[[Nils Mustelin]] (Finland, 1931–2004)
}}