TUCSON, Arizona, Jan. 15 -- The Astrophysical Journal, a research journal from the American Astronomical Society that says it is devoted to recent developments, discoveries and theories in astronomy and astrophysics, published research articles on the following topics in its Nov. 20, 2023, edition (Vol. 958, No. 1).

Here are excerpts:

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* Evolutionary Relationship between Sunspot Groups and Soft X-Ray Flares over Solar Cycles 21-25

* Rankin . . .

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