Abstract
A RECENT feature of interest on the sun's disc has been a group of sunspots that appeared suddenly near the central meridian between August 19 and 20. Its growth is shown as follows, the unit of area being one millionth of the sun's hemisphere:
Article PDF
Rights and permissions
About this article
Cite this article
An Active Sunspot. Nature 136, 333 (1935). https://doi.org/10.1038/136333a0
Issue Date:
DOI: https://doi.org/10.1038/136333a0