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observing aids

Title Posted By Updated/commented date Typesort icon
Visual Observing Manual in Persian BSJ 3 years 50 weeks ago Page
Visual Observing Manual - Spanish BSJ 2 years 6 weeks ago Page
The Zurich Classification System of Sunspot Groups Matthew Templeton 4 years 29 weeks ago Page
Charts and Sequences Update January 2012 SXN 4 years 2 weeks ago Page
The Photoelectric Photometry (PEP) Observing Program of the AAVSO: An Introduction Anonymous 38 weeks 5 days ago Page
Useful links for new solar observers Matthew Templeton 3 years 17 weeks ago Page
AAVSO Bulletin Matthew Templeton 2 years 18 weeks ago Forum topic
AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484