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Alexander Binder - Public Domain
John Handy - Public Domain
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[http://www.astro.uu.nl/~rutten/Rob_s_astronomer_shots.html] - CC BY-SA 3.0
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unknown - Public Domain
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anónimo siglo XVII-Biblioteca Nacional de España - CC BY-SA 4.0
USA - Public Domain
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RICHARDJRBP - CC BY-SA 3.0
Lasso, Gloria
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Fondo Antiguo de la Biblioteca de la Universidad de Sevilla - CC BY 2.0
Morales, Ambrósio de, 1513-1591
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Naiaomdredom - CC BY-SA 3.0
Zeng, Fanzhi, 1964-
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Leslie Cashen - CC BY 1.0
Ludwig, Ken
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Jackson, Joe, 1954-
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Rawlinson, George, 1812-1902
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Baumfelder, Friedrich, 1836-1916
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Ghioldi, Américo, 1899-
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Huang, Fu, 1880-1936
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Alexander Binder - Public Domain
Krauss, Werner, 1884-
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John Handy - Public Domain
Hume, Paul, 1915-2001
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Tomdog - CC BY-SA 3.0
Gray, James, 1969-
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NBC-photographer: Frank Carroll - Public Domain
Chase, Barrie
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[http://www.astro.uu.nl/~rutten/Rob_s_astronomer_shots.html] - CC BY-SA 3.0
Hulst, H. C. van de (Hendrik Christoffel), 1918-
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Oneal, James, 1875-
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Legge, Thomas, 1535-1607
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Obin, Philomé
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Whipple, Edwin Percy, 1819-1886
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O'Sullivan, John L. (John Louis), 1813-1895
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unknown - Public Domain
Byfield, Adoniram, -1660
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Shoemaker, Charles Frederick, 1841-
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Kean, Charles John, 1811?-1868
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Stanley, Andy
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Longacre, James Barton, 1794-1869
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anónimo siglo XVII-Biblioteca Nacional de España - CC BY-SA 4.0
Medina, Bartolomé de, 1527 or 1528-1580
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Kelley, P. X. (Paul X.), 1928-
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Caldwell, Alexander, 1830-1917
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Bourne, Benjamin, 1755-1808
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Hutto, Earl, 1926-
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USA - Public Domain
Lê, Đức Thọ, 1911-1990