Please find attached the SkyNews supplement which has predictions of Eclipses, Occultations and transits of Galilean moons for September 2022.
Measuring Speed of Light by Roemer’s method can be a very interesting observational exercise.Prof Jasjeet Singh Bagla had done this exercise when he was in college.
For his article please visit https://diyastronomy.wordpress.com/speed-of-light-roemers-method/
Today one should be able to do better than that think of making this simple electronic eyepiece please visit https://diyastronomy.wordpress.com/diy-electronic-eyepiece/
-Mr Arvind Paranjpye