What a nice review from Olga Markova, 5 stars. I could not have expected more!
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I have designed and built a handy sky quality meter. Using Nextion display and a tiny pi zero. 
If you would like to practice building a nice image of Orion nebular but do not have the time to collect all the images… They are now available on this site. Many thanks to the reviewers!  Finally my book is on Amazon Kindle and available in paperback. It should be on the Amazon site now. Novella set in Oklahoma. Fiction Thriller Conspiracy .  Harrison Files by John Mallett Buy Book click: https://www.amazon.co.uk/dp/B0DJRFVWC5?ref=ppx_yo2ov_dt_b_fed_asin_title Suspense thriller where two friends and business partners find themselves in a conspiracy that threatens national security and also all their friends Many thanks to Aylesbury AS for using Astrospeakers.org. It was a good evening. Amazing aurora over Selsey Observatory midnight on 10th May 2024. We are nearly at the peak of a sunspot cycle so watch out for more events.  The lecture on technical challenges of measurement in astronomy went well and loads of interesting questions. All started from the slow (15years) of looking for exoplanets round V470 Cam. Easily visible reduction in the errors over the time I have been making measurements. Some of the error reduction techniques I have used. Delivered to a great audience at the Farnborough Site (Cody AS). Mix of history, science, technical information and current research. Need to put it on Astrospeakers.org Now loaded on arXiv.org Cornell University Archive.
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