Bye bye AR1520July 15, 2012|Sun, Sun H-alpha Home » Sample Page » Sun » Sun H-alpha » Bye bye AR1520 Active region 1520, which gave a nice show on 12th July 2012, is leaving the visible solar disk. Bye, bye! Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Name* Email* Website Save my name, email, and website in this browser for the next time I comment. Time limit is exhausted. Please reload the CAPTCHA. four + 5 = By using this form you agree with the storage and handling of your data by this website. * This site uses Akismet to reduce spam. Learn how your comment data is processed.