Annie Cannon was born in 1863 and died in 1941
she classified stars in the southern spectra
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- they were around in the 19th centurythey discovere...
- S. Chand developed a theory of white dwarf starsh...
- Arno was born in 1933 he is still aliveRobert was ...
- Annie Cannon was born in 1863 and died in 1941she ...
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