The Solar Spots

Details The Solar Spots The Solar Spots

Aug 1870

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1870natur...2..298d&link_type=abstract

Nature, Volume 2, Issue 41, pp. 298 (1870).

Physics

Scientific paper

I HAVE been much interested of late in observing the solar spots, and especially in the greatly-increased numbers which have lately made their appearance. I have counted from 100 to 200 spots, through a six-feet telescope, with a power of 100, quite frequently in the past few months. On the 22nd ult., with a power of 200, I counted 675 sun spots, and on the 27th saw 470 with the 100 eyepiece. In general, I think the number of spots visible is about in proportion to the power used when the atmosphere is favourable for high powers. During the month several spots were visible to the naked eye.

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