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observing aids

Title Posted By Updated/commented datesort icon Type
The Zurich Classification System of Sunspot Groups Matthew Templeton 4 years 40 weeks ago Page
2011 JD Calendar BSJ 5 years 19 weeks ago Page
About Julian Dates BSJ 5 years 20 weeks ago Page
Computing the JD or UT BSJ 5 years 20 weeks ago Page
VLF Station List Matthew Templeton 5 years 40 weeks ago Page
Guidelines for new solar observers Matthew Templeton 5 years 40 weeks ago Page
Atmospheric seeing conditions for solar observing Matthew Templeton 5 years 40 weeks ago Page
Frequency of Observations for Different Variable Star Types BSJ 5 years 47 weeks ago Page
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