Alternative definitions (1),
class:
vernacular (0)

Term: | Sunspot number |

Definition: |
A quantity which gives the number of sunspots at a given time. It is defined by the relationship R = k(10g + f), where R is the sunspot number, k is a constant depending on the observation conditions and the instrument used, g is the number of the groups and f is the number of individual spots that can be counted. |

Created 2023.04.16

Last Modified 2023.04.16

Contributed by Ryan
McGranaghan

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