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Updated: July 8, 2026
Its natural and obvious character was shown by its having struck several observers independently. The distinction of "cloud-prominences" from "flame-prominences" was announced by Lockyer, April 27; by Zöllner, June 2; and by Respighi, December 4, 1870. The first description are tranquil and relatively permanent, sometimes enduring without striking change for many days.
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