When most flat earthers are asked what the stars and planets in the sky are, the most common explanation is that they are lights in the firmament either above, below or embeded in. When asked what planets are, the most common answer is that they are wandering stars. So same as stars but they....wander.
A number of flat earthers have taken videos of stars and planets, showing shimmering objects and have taken these as proof that these "objects" are in the "waters above" or at least that the planets are "not what we are told". But by far the most common flat earth explanation is that these objects are simply lights and are not physical objects in any way.
I saw a picture taken by an amature astronomer of some of Jupiter's moons. In particular, callisto is seen to throw a shadow on the Jovian surface.
Now if these objects are simply lights, how do they create shadows?
Since any amature astronomer can make these observations and see the light purported to be Jupiter, and see the lights ourported to be it's moons, and see these lights cast a shadow on another light, how is this explained in flat earth?
I wish I could put up a licture here but I don't know how to do that. So here's a link to a website having the picture.
https://britastro.org/node/9502