3 ms·
This site seems to have a good selection: https://www.celestaire.com/ https://www.celestaire.com/ . A person commenting in the San Francisco Amateur Astronomers
by gcheong 8y ago
This site seems to have a good selection: https://www.celestaire.com/ https://www.celestaire.com/ . A person commenting in the San Francisco Amateur Astronomers facebook page where I posted this course mentioned they have an Astra III-B