Sun - Moon - Planets - Comets & Small Solar System Bodies - Messier Objects - NGC & IC Objects - Events, Widefield & Montages - Stars - Telescope
Spot AR 12546 Comparison in Ha and White Light
In white light, the Sun spot is about three times the size of the Earth. However, in Ha, its influence spreads much further, to at least fifteen times the diameter of the Earth. Lunt LS50THa scope and x2 barlow- 16-05-16.