158 citations · 583 across the 18 of their papers we have counts for
4 papers · 1 filter
Revisiting the Amplitude of Solar Cycle 9: The Case of Sunspot Observations by W.C. Bond
V. M. S. Carrasco, M. C. Gallego, R. Arlt +1
William Cranch Bond, director of the Harvard College Observatory in mid-19th century, carried out detailed sunspot observations during the period 1847-1849. We highlight Bond was t…
Sunspot Records by Antonio Colla just after the Dalton Minimum
V. M. S. Carrasco, C. Bertolin, F. Domínguez-Castro +3
Antonio Colla was a meteorologist and astronomer who made sunspot observations at the Meteorological Observatory of the Parma University (Italy). He carried out his sunspot records…
Number of Sunspot Groups from the Galileo-Scheiner controversy revisited
V. M. S. Carrasco, M. C. Gallego, J. M. Vaquero
We revise the sunspot observations made by Galileo Galilei and Christoph Scheiner in the context of their controversy on the nature of sunspots. Their sunspot records not included…
Sunspot characteristics at the onset of the Maunder Minimum based on the observations of Hevelius
V. M. S. Carrasco, J. M. Vaquero, M. C. Gallego +8
An analysis of the sunspot observations made by Hevelius during 1642-1645 is presented. These records are the only systematic sunspot observations just before the Maunder Minimum.…