File:330-PSA-114-60 (USN 1048561) (20887590002).jpg

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Description 330-PSA-114-60 (USN 1048561): White dots in the center of sun spot are shown clearly for the first time in this photograph taken 80,000 feet above the Earth in Stratoscope I Balloon-Borne Telescope. Less than 200 miles in diameter, these spots are apparently convection cells of rising gases, hotter than the surrounding area, but strongly suppressed by the magnetic field of the sun spot. The long diameter of the umbra (black area) is roughly the diameter of the earth. This photograph was taken by a Princeton University Team headed by Dr. Martin Schwarzechild on September 24, 1959, near Minneapols, Minnesota. Stratoscope I was sponsored by the National Science Foundation of the Office of Naval Research. Photograph released July 13, 1960. (8/25/2015).
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Source 330-PSA-114-60 (USN 1048561)
Author National Museum of the U.S. Navy

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This image was originally posted to Flickr by Photograph Curator at https://flickr.com/photos/127906254@N06/20887590002 (archive). It was reviewed on 10 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark.

10 July 2018

Public domain
This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.

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current04:46, 10 July 2018Thumbnail for version as of 04:46, 10 July 20182,352 × 2,612 (835 KB)Hiàn (alt) (talk | contribs)Transferred from Flickr via #flickr2commons

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