Free Astronomy Observing Guides

Before these get lost in the ether (again!) I want to put them on my blog. Some years back a few of us put together some observing challenge booklets for the Irish Federation of Astronomical Societies. I don’t think the certificates are still being offered but they are a great resource if you are stuck

Astronomy, Light Pollution

Light Pollution Observations parser

I’ve created some code to do basic processing of light pollution observation files at This came about from chatting to Prof. Brian Espey about processing the data from the SQM data loggers that he and others use around the country to monitor Irish dark skies and to assis the Dark Sky Places (and prospective


C9.25 tube wobbling

I’ve been having a problem over the past few months of the focus in my scope drifting unacceptably out of focus when imaging targets around the sky. Even when staying on same target for extended periods of time there was a noticeable shift. In some extreme cases the collimation also appears to be way off.

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