Christian Horrebow's Sunspot Observations - II. Construction of a Record of Sunspot Positions

Karoff, C; Jorgensen, CS; Pavai, VS; Arlt, R

Karoff, C (reprint author), Aarhus Univ, Dept Geosci, Hoegh Guldbergs Gade 2, DK-8000 Aarhus C, Denmark.; Karoff, C (reprint author), Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.

SOLAR PHYSICS, 2019; 294 (6):

Abstract

The number of spots on the surface of the Sun is one of the best tracers of solar variability we have. The sunspot number is not only known to change ......

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