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William Wallace Campbell, US astronomer

Hugo von Seeliger, German astronomer

William Eichelberger, US astronomer

Seth Chandler, US astronomer

Winslow Upton, US astronomer

Lewis Boss, US astronomer

James Keeler, US astronomer

Charles Young, US astronomer

Henry Parkhurst, US astronomer

Thomas Simonton, US astronomer

Annie Jump Cannon, US astronomer

Asaph Hall III, US astronomer

Benjamin Gould, US astronomer

Daniel Kirkwood, US astronomer

Maria Mitchell, US astronomer

William Coblentz, US physicist

Elizabeth Roemer, US astronomer

Hubert Newton, US astronomer

Camille Flammarion, French astronomer

Richard Proctor, British astronomer

Frederick Brodie, British astronomer

James Bradley, English astronomer

Clyde Tombaugh, US astronomer

George Biddell Airy, English astronomer

Martin Harwit, Czech-American astronomer

Otto Struve, Russian-US astronomer

Dirk Brouwer, Dutch-American astronomer

Walter Sydney Adams, American astronomer

Maurice Loewy, French astronomer

Margaret Harwood, US astronomer

Alfred Hershey, US geneticist

Alfred Hershey, US geneticist

Nicholas Kratzer, German astronomer

Camille Flammarion, French astronomer

Muriel Mussells Seyfert, US astronomer

William Coblentz, US physicist

William Coblentz, US physicist

Camille Flammarion, US astronomer

25-inch Newall refractor telescope, 1873

G. Robert Coatney, US parasitologist

Martin D. Young, US parasitologist

Firman Bear, US soil scientist

Irving Hochstadter, US chemical engineer

Harlow Shapley, American astronomer

Percy Williams Bridgman, US physicist

William Swann, US physicist

William Swann, US physicist

William Swann, US physicist

Mills Observatory, Dundee

Percival Lowell, US astronomer

Meridian circle instrument, 1880s

Lord Lindsay's eclipse expedition, 1870

Margaret Burbidge, British-US astronomer

Urbain Le Verrier, French astronomer

John Dee, English astrologer

John Dee, English astrologer

Joseph Norman Lockyer, English astronomer

Mary Steichen Calderone, US doctor

Donald Fredrickson, US physiologist

View of Jill Tarter, American astronomer, at work

James Bradley (1693-1762), English Astronomer and Priest, Served as Astronomer Royal, Engraving by E. Scriven

Nicholas Vavilov, Soviet botanist

Nicolaus Copernicus, Polish astronomer

Margaret Harwood, US astronomer

Theodore William Richards, US chemist

Theodore William Richards, US chemist

Edgar Frisby, US astronomer

John Herschel, British astronomer

Jerome Alexander, US chemist

Thomas Wright, British astronomer

Linn Bradley, US chemical engineer

William Swann, US physicist

15-inch telescope, Edinburgh Observatory

Katherine Blundell, British astronomer

Alexander Boksenberg, British astronomer

John Brown, British astronomer

Margaret Penston, British astronomer

Carlos Chagas, Brazilian bacteriologist

James Nasmyth, Scottish engineer

M. Rowan-Robinson, British astronomer

US radio astronomer Grote Reber and first radio telescope

Fred Soper, US epidemiologist

Daniel Gambis, French astronomer

Rolla Dyer and Salvador Luria, 1960s

Joseph Pawsey, Australian radio astronomer

Kristine Bonnevie, Norwegian biologist

William Herschel, English astronomer

Jesse Ramsden, English instrument maker

German astronomical observatory, artwork

German astronomical observatory, artwork

Holmes, Walcott and Gannett, US geologists, 1897

Edward S. Ayensu, Ghanian scientist and economist

Herbert Hendin, US psychiatrist

Mary Helen Wright Greuter, US astronomer

William Cogswell, US industrialist

Johannes Stoeffler, German mathematician

Henry Andrews, English astronomer

Jacob Hasslacher, German-US industrialist

Jacques Loeb, German-US physiologist

Hugo Munsterberg, German-US psychologist

An astronomer (Ptolemy of Alexandria?)

Sears Cook Walker, American astronomer

Francesco Bianchini, Italian astronomer

Joseph Silk, British-US cosmologist

Cecilia Payne-Gaposchkin, British-US astronomer

Cecilia Payne-Gaposchkin, British-US astronomer

William Swann, US physicist

Astronomer

Astronomer

Mark Bailey, British astronomer

Patrick Moore, British astronomer

Arnold Wolfendale, British astronomer

Dominique Francois Jean Arago, astronomer

Arthur Linz, US chemist

Ancient Chinese astronomer.

Maud Menten, Canadian biochemist

Cleveland Abbe, US meteorologist

Edward Bartow, US chemist

Charles Baskerville, US chemist

Charles Chandler, US chemist.

Carleton Ellis, US chemist

Florence Sabin, US medical scientist

Florence Sabin, US medical scientist

Leslie Jenness, US chemical engineer

Gerard Gilmore, NZ-British astronomer

Francis Graham-Smith, British astronomer

Donald Lynden-Bell, British astronomer

Royal Institution Christmas Lecture, 1944

Mary Constance Blair, US botanist

Mary Jane Rathbun, US zoologist

Herbert Dow, US chemical industrialist

Victor Bloede, German-US chemist

Jeanette Scissum, NASA scientist

Karl Ludwig Hencke, German astronomer

University of Chicago physicists, 1908

Jocelyn Bell Burnell, British astronomer

15-inch reflector telescope, 1887

Ruggero Boscovich, Croatian astronomer

Svante Arrhenius, Swedish chemist

Albert Blakeslee, US botanist

Geoffrey Marcy, US astronomer

Geoffrey Marcy, US astronomer

Donald Fredrickson, US physiologist

Galileo Galilei, Italian astronomer

Solar eclipse observers, 1860

William Thayer, US physician

Edward Laurens Mark, US zoologist

Edward S. Ayensu, Ghanian scientist and economist

Frank Drake, US astrophysicist

1874 Transit of Venus observers

Alfred Hershey, US geneticist

Hipparchus, Ancient Greek astronomer

Doppler spectroscopy, 1974

Tatel radio telescope control room, 1960s

Karl Jansky, US radio engineer

Tatel radio telescope and US astrophysicist Frank Drake

William Herschel, English astronomer

USNO solar eclipse expedition, 1925

Janssen at Meudon Observatory, 1893

Moon, 1870

Lunar crater model, 1850s

David Rittenhouse, American astronomer

Lewis Morris Rutherford, astronomer

Christiaan Huyghens, Dutch astronomer

Leviathan of Birr, Ireland, 19th century

Charles Gnadinger, US chemist

Lloyd Berkner, founding acting director of NRAO

Whaling industry, mid-20th century

Ernst Beckmann, German chemist

George Carver, US agriculturist

Herbert Jennings, US geneticist

Bertram Boltwood, US radiochemist

Edward Acheson, US chemist

Galileo Galilei, Italian astronomer

Haldan Keffer Hartline, US physiologist

Bennett Epstein, US chemical engineer

Jacques Loeb, German-US physiologist

Alexander Kolin, German-US biophysicist

Mildred Scoville, US mental health worker

Urbain Jean Joseph Leverrier, astronomer

Urbain Jean Joseph Leverrier, astronomer

Jean Sylvain Bailly, French astronomer

Edmund Wilson, US cell biologist

Edward Knobel, British astronomer

Bengt Stromgren, Danish astrophysicist

Sandra Chapman, British astrophysicist

Leonard Culhane, British astrophysicist

Yvonne Elsworth, British astrophysicist

Andrew Fabian, British astrophysicist

Carole Jordan, British astrophysicist

Malcolm Longair, British astrophysicist

Ken Pounds, British astrophysicist

Nigel Weiss, British astrophysicist

Henry Hurd, US psychiatrist

Russell Hulse, US astrophysicist

Eleanor Plunkette Brown, US health campaigner

Fritz Haber, German chemist

Fritz Haber, German chemist

Adam Schall, German Jesuit astronomer

Tycho Brahe's Astronomical Instruments title page