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Les Plus Grands Scientifiques

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#: 421 - 430

# Nom
Année
Pays
Science
RĂ©alisations
421 Chushiro_Hayashi_1704.jpg
Chushiro Hayashi

1920-2010
Le Japon
Astronomie

discovered the pattern followed by pre-main-sequence stars on H-R diagrams (now called the Hayashi track); discovered the maximum radius for a star of a given mass (the Hayashi limit)
422 Edwin_E._Salpeter_1705.jpg
Edwin E. Salpeter

1924-2008
L'Autriche
Astronomie

explained how the triple-alpha reaction could make carbon from helium in stars; worked on atomic theory and quantum electrodynamics; co-developed the Bethe-Salpeter equation
423 Allan_R._Sandage_1706.jpg
Allan R. Sandage

1926-
USA
Astronomie

identified the first quasar, and discovered many more; determined ages of many globular clusters
424 Vera_Rubin_1707.jpg
Vera Rubin

1928-
USA
Astronomie

measured rotation curves for distant galaxies and ultimately concluded that 90% or more of the universe is made of invisible dark matter
425 Riccardo_Giacconi_1708.jpg
Riccardo Giacconi

1931-
L'Italie
Astronomie, Physique

pioneer of x-ray astronomy; participated in discovery of the first known x-ray source outside the solar system (Scorpius X-1)
426 Sir_Roger_Penrose_1709.jpg
Roger Penrose

1931-
Royaume-Uni
Astronomie

contributed to the development of general relativity by showing the necessity for cosmological singularities; elucidated the physics of black holes
427 John_N._Bahcall_1710.jpg
John N. Bahcall

1934-
USA
Astronomie, Physique

made important theoretical contributions to understanding solar neutrinos and quasars
428 Carl_Sagan_1711.jpg
Carl Sagan

1934-1996
USA
Astronomie

was a leader in the search for extraterrestrial intelligence; contributed to most of the space missions to explore Mars and the outer planets; warned that all-out nuclear war could lead to a ``nuclear winter''
429 James_W._Christy_1712.jpg
James W. Christy

1938-
USA
Astronomie

discovered Pluto's satellite, Charon
430 William_K._Hartmann_1713.jpg
William K. Hartmann

1939-
USA
Astronomie

well-known painter of astronomical themes; co-developed the most widely accepted theory of the formation of the Moon (from the collision of a giant planetismal with the Earth at the close of the planet-forming period of the solar system)

Dernière mise à jour: 2018-04-19

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