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Paper: Island Universes, Novae and Supernovae.
A Great Debate of the XX Century
Volume: 342, 1604-2004: Supernovae as Cosmological Lighthouses
Page: 43
Authors: Pigatto, L.
Abstract: The concept of island universes as very great stellar structures, was conceived in the 18th century. This fascinating idea started to be taken into consideration as soon as great telescopes permitted to observe and classify numerous and different-shape nebulae, especially spirals, in which novae were discovered. In 1920, a public debate concerning the scale of the universe, took place in Washington: Heber D. Curtis and Harlow Shapley presented their different opinion on this subject. Since that time, a new view of the universe and its dimension started to be considered.
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