Sep 1872
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1872natur...6..393d&link_type=abstract
Nature, Volume 6, Issue 150, pp. 393 (1872).
Other
Scientific paper
BY an observation of the sun this morning at 11h. 25m., I find that several parts of his surface are in a disturbed condition, and that several largish spots (maculœ), surrounded with pe-numbræ, are visible. In the north-west quadrant of the disc, near the west limb, there was a group seen, in which two rather conspicuous spots were situated, and below these, in the southern hemisphere, there were three others of somewhat considerable dimensions. In the same hemisphere there was an irregular train of spots of various forms and sizes, extending almost to the margin of the south-eastern part of the disc. In the north-east quadrant I could discern no spots at all. Light clouds were continually passing over the sun during the time of observation. I used a 4-inch metallic-mirror reflector, with the aperture contracted to three inches.
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