Hi John, > Does anybody know the difference in the apparent diameter of the sun, in > degrees, between perihelion and aphelion? Is this significant?
The info you want is in the BSS Glossary (plug, plug!) under "semidiameter". The answers are 15.76 arcmins in July (aphelion) and 16.29 arcmins in January (perihelion). For the purposes of looking at sunspots, I'd say this was insignificant. If the differences were much larger, it would have a noticeble affect on the seasonal temperatures! Best regards, John ------------------------------------------------------------------------ Dr J R Davis Flowton, UK 52.08N, 1.043E email: [EMAIL PROTECTED]
