RT @JanHattenbach: Huge Sunspot group AR1944 (renamed AR 1967) returns after two-week trip around sun’s farside: spaceweathergallery.com/indiv_upload.p… htt…
RT @JanHattenbach: Huge Sunspot group AR1944 (renamed AR 1967) returns after two-week trip around sun’s farside: spaceweathergallery.com/indiv_upload.p… htt…