swap_horiz Andre-Louis Danjon Alternatives

1

Georges Lemaître

Georges Lemaître was a Belgian astronomer and Catholic priest whose work profoundly shaped modern cosmology. He develope...

Cosmology 20TH Century Historical Belgian

9.2 Excellent

2

Joseph H. Taylor Jr.

Joseph H. Taylor Jr. was a 20th-century American astrophysicist renowned for his pioneering work in radio astronomy and...

Radio 20TH Century Pulsars Nobel

8.9 Great

3

Karl Jansky

Karl Jansky was an American engineer and astronomer whose work fundamentally changed our understanding of the universe....

American 20TH Century Historical Radio Astronomy

8.7 Great

4

Robert W. Wilson

Robert W. Wilson was a 20th-century American astronomer renowned for his pioneering work in radio astronomy. His meticul...

Radio 20TH Century Nobel Cmb

8.7 Great

5

Guo Shoujing

Guo Shoujing (1231–1308) was a prominent Chinese astronomer during the Yuan Dynasty. He is best known for designing the...

Calendar Medieval Chinese Instruments

8.6 Great

6

Alastair G. W. Cameron

Alastair G. W. Cameron was a Canadian-American astrophysicist, noted for nuclear astrophysics and the giant-impact theor...

Theory 20TH Century Planetary Nucleosynthesis

8.4 Great

7

Bernard Lyot

Bernard Lyot was a French astronomer who invented the coronagraph in 1930, enabling solar-corona observations outside to...

France 20TH Century Solar Coronagraph

8.4 Great

8

John Gatenby Bolton

John Gatenby Bolton was a British-Australian radio astronomer who identified discrete radio sources with galaxies and wa...

Australia Radio 20TH Century Quasars

8.3 Great

9

Al-Zarqali

Abu al-Rayhan Muhammad ibn Ahmad al-Zarqali was a prominent medieval Islamic astronomer active in Toledo during the 11th...

Medieval Islamic Instruments Tables

8.1 Great

10

Grote Reber

American radio engineer (1911–2002) who in 1937 built the first purpose-built parabolic radio telescope in his backyard...

American 20TH Century Historical Radio Astronomy

8.1 Great

11

Yi Xing

Yi Xing was a Tang dynasty Chinese Buddhist monk, mathematician, and astronomer noted for the 724 Da Yan calendar and ge...

China Calendar Medieval Instruments

8.1 Great

12

Fred Lawrence Whipple

Fred Lawrence Whipple was an American astronomer who proposed the icy dirty snowball comet model in 1950 and led Smithso...

Theory 20TH Century Solar System Comets

8.1 Great

13

George Ogden Abell

George Ogden Abell was an American astronomer who compiled the 1958 Abell catalogue of 2,712 rich galaxy clusters from P...

Catalog 20TH Century Galaxies Clusters

7.8 Good

14

Joseph Lade Pawsey

Joseph Lade Pawsey was an Australian radio astronomer at CSIRO, known for early solar and Galactic radio observations an...

Australia Radio 20TH Century Solar

7.8 Good

15

Adriaan Blaauw

Adriaan Blaauw was a Dutch astronomer, ESO director from 1970 to 1975 and a key figure in explaining runaway stars and O...

20TH Century Stellar Associations Iau

7.7 Good

16

Seth Carlo Chandler

Seth Carlo Chandler was an American astronomer who discovered the Chandler wobble in 1891, a small 433-day shift in Eart...

History Variable Stars Nineteenth Century Astrometry

7.6 Good

17

Taqi ad-Din Muhammad ibn Ma'ruf

Taqi ad-Din Muhammad ibn Ma'ruf was a 16th-century Ottoman astronomer who founded the Istanbul Observatory in 1577, cons...

Medieval Observatory Ottoman Instruments

7.6 Good

18

Brian Marsden

Brian Marsden was a British astronomer who directed the Minor Planet Center from 1978 and became a leading authority on...

Catalog 20TH Century Comets Minor Planets

7.4 Good

19

Michael F. A'Hearn

Michael F. A'Hearn was an American astronomer who led NASA's Deep Impact mission, which struck comet Tempel 1 with an im...

20TH Century Comets Small Bodies Missions

7.3 Good

20

Marc Aaronson

Marc Aaronson was an American astronomer at Steward Observatory, known for Tully-Fisher distance work before his 1987 de...

20TH Century Infrared Galaxies Distance Scale

7.2 Good