Image from Wikimedia Commons
unknown - Public Domain
Ghirardi - Barchetta - Public Domain
James Ward, after James Green - Public Domain
Public Domain
trailer screenshot (MGM) - Public Domain
NASA - Public Domain
Eva Rinaldi - CC BY-SA 2.0
Courtesy Century Co. - Public Domain
Dschwen - CC BY-SA 4.0
Van Walker - CC BY-SA 4.0
C.S. Forbes - Public Domain
ETH Zürich - CC BY-SA 3.0
NBC Television - Public Domain
Krzna - CC BY-SA 3.0
Contact '97 - CC BY 3.0
Image from Wikimedia Commons
unknown - Public Domain
Doles, Johann Friedrich, 1715-1797
Image from Wikimedia Commons
Eckert, Fred J., 1941-
Image from Wikimedia Commons
Ghirardi - Barchetta - Public Domain
Melloni, Macedonio, 1798-1854
Image from Wikimedia Commons
James Ward, after James Green - Public Domain
Cooke, George Frederick, 1756-1812
Image from Wikimedia Commons
Wade, George, 1673-1748
Image from Wikimedia Commons
Public Domain
Mantell, Gideon Algernon, 1790-1852
Image from Wikimedia Commons
Public Domain
Van Valkenburgh, R. B. (Robert Bruce), 1821-1888
Image from Wikimedia Commons
trailer screenshot (MGM) - Public Domain
Kingsford, Walter, 1881-1958
Image from Wikimedia Commons
NASA - Public Domain
Scully-Power, Paul, 1944-
Image from Wikimedia Commons
Eva Rinaldi - CC BY-SA 2.0
Kidder, Margot
Image from Wikimedia Commons
Courtesy Century Co. - Public Domain
Anderson, Richard Heron, 1821-1879
Image from Wikimedia Commons
Dschwen - CC BY-SA 4.0
Pirner, Dave
Image from Wikimedia Commons
Orton, James, 1830-1877
Image from Wikimedia Commons
Van Walker - CC BY-SA 4.0
Merrill, Helen
Image from Wikimedia Commons
Chung, Connie
Image from Wikimedia Commons
Jin, Ha, 1956-
Image from Wikimedia Commons
Eliot, Vivienne, 1888-1947
Image from Wikimedia Commons
C.S. Forbes - Public Domain
Smith, J. Gregory, Mrs., 1819-1905
Image from Wikimedia Commons
Christy, Robert
Image from Wikimedia Commons
James, Harry, 1916-1983
Image from Wikimedia Commons
ETH Zürich - CC BY-SA 3.0
Weyl, Hermann, 1885-1955
Image from Wikimedia Commons
Zwinger, Theodor, 1658-1724
Image from Wikimedia Commons
NBC Television - Public Domain
Williams, John, 1903-1983
Image from Wikimedia Commons
Brite, Poppy Z.
Image from Wikimedia Commons
Francis, Alec B., 1867-1934
Image from Wikimedia Commons
Borovikovskiĭ, Vladimir Lukich, 1757-1825
Image from Wikimedia Commons
Sherlock, Thomas, 1678-1761
Image from Wikimedia Commons
Krzna - CC BY-SA 3.0
Ranganathan, S. R. (Shiyali Ramamrita), 1892-1972
Image from Wikimedia Commons
Contact '97 - CC BY 3.0
Griffiths, David, 1950-
Image from Wikimedia Commons
Carafa, Carlo, approximately 1517-1561