Alexander William Roberts, Scottish-born South-African astronomer (Farr, Sutherland 04 December 1857 – Alice, Eastern Cape 27 January 1938)
Authored over 100 works
Discovered some variable stars
With H.N. Russell demonstrated that the components of some of binary star systems are low-density stars with gigantic diameters
Developed a visual photometer
Lunar crater Roberts
Juan de Palafox y Calva Galvez, Mexican mathematician and clockmaker (born…
Moacyr Eyck Alvaro Marques da Silva da Cunha e Fernandes,…
Silvano Mario Attilio Raia, Brazilian surgeon (São Paulo 01 September 1930…
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