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[en] Very fast vibrations of the solar image during telescopic observations are discussed. It was found that, due to atmospheric heat turbulence, the positions of individual detailed formations in the sunspot umbra in pictures taken over an interval of 2.5 s may differ by as much as 1''. (author)
Journal
Bulletin of the Astronomical Institutes of Czechoslovakia; ISSN 0004-6248; 
; v. 31(1); p. 6-8
; v. 31(1); p. 6-8