Donald Howard Menzel
Born: April 11, 1901
Died: December 14, 1976 (aged 75)
Bio: Donald Howard Menzel was one of the first theoretical astronomers and astrophysicists in the US. He discovered the physical properties of the solar chromosphere, the chemistry of stars, the atmosphere of Mars, and the nature of gaseous nebulae.
Known for:
- Mathematical Physics (1953)
- Flying Saucers (1953)
- A field guide to the stars and planets (1964)
- The UFO enigma
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