1

Carl Sagan (1934-1996)

2

Nicolaus Copernicus (1473-1543)

3

Benjamin Banneker (1731-1806)

4

Edwin Hubble (1889-1953)

5

Johannes Kepler (1571-1630)

6

Ibn Al-haytham (965-1040)

7

Tycho Brahe (1546-1601)

8

Anders Celsius (1701-1744)

9

Maria Mitchell (1818-1889)

10

William Herschel (1738-1822)

11

Clyde Tombaugh (1906-1997)

12

James Van Allen (1914-2006)

13

Annie Jump Cannon (1863-1941)

14

Caroline Herschel (1750-1848)

15

Percival Lowell (1855-1916)

16

Charles Smyth (1819-1900)

17

Nasir Al-din Al-Tusi (1201-1274)

18

Nancy Grace Roman (1925-2018)

19

Henrietta Leavitt (1868-1921)

20

Phil Plait, 56

21

Ulugh Beg (1394-1449)

22

David Rittenhouse (1732-1796)

23

Giovanni Domenico Cassini (1625-1712)

24

Andrea Ghez, 56

25

John Herschel (1792-1871)

26

A E Douglass (1867-1962)

27

George Mueller (1918-2015)

28

Harlow Shapley (1885-1972)

29

Norman Lockyer (1836-1920)

30

Ole Romer (1644-1710)

31

James E. Keeler (1857-1900)

32

Jan Oort (1900-1992)

33

Ormsby M. Mitchel (1810-1862)

34

Williamina Fleming (1857-1911)

35

James Westphal (1930-2004)

36

Grote Reber (1911-2002)

37

Ernst Opik (1893-1985)

38

Russell W. Porter (1871-1949)

39

George Van Biesbroeck (1880-1974)

40

Robert Stawell Ball (1840-1913)

41

William Harkness (1837-1903)

42

Edward Sabine (1788-1883)

43

Brian O'Leary (1940-2011)

44

Jack Horkheimer (1938-2010)

45

Sheila Widnall, 83

46

Giovanni Schiaparelli (1835-1910)

47

Vytautas Straizys, 85

48

Otto Wilhelm Von Struve (1819-1905)