One thing I always like to add is that ground based telescopes benefit from being able to take huge amounts of data. The Vera Rubin Observatory will have a 3.5 Gigapixel camera. There are proposals to ...

I always think the strongest demonstration that the earth moves is using a Foucault Pendulum at different latitudes. If you combine this with Eratosthenes measurement of the circumference of the earth,...

No, you can't perfectly subtract out satellite trails from images. The root problem is that astronomical cameras are essentially photon counters. Any time you are counting, you are limited by Poisson ...