Word: allers
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Dates: during 1940-1949
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...Harvard astronomers, Dr. D. H. Menzel and L. H. Aller '39, reported to the American Astronomical Society last week that star "shells" are made of the same elements as stars themselves. They found that the planetary nebulae, which are great clouds of gas surrounding the very hot O-type stars, are composed chiefly of hydrogen, helium, carbon nitrogen, and oxygen...
Subsequent lectures in the series will be: May 23. "Latest Telescopic Developments", by. Dr. G. Z. Dimitroff; May 26, "Why Count Stars", by D. A. MacRae; and May 28, "Island Universes", by L. H. Aller...