Tonight there is a full lunar eclipse which is when the Earth comes between the Sun and the Moon and the earth casts its shadow on the moon.
As it progresses first there is shadow on one side of the moon. Gradually. Like a solar eclipse the curve of the Earth cuts into the Moon. As it progresses the white light from the sun is cut out by Earth’s shadow until only red light passes through Earth’s atmosphere and the Moon turns orangey red. Then the Moon starts to pull out of the shadow and gradually returns to normal
Tonight the moon is at its closest approach to earth so it is known as a super moon.
As a matter of interest I decided to try and draw what a flat earth would look like…. It would cast a flat shadow.. When it was fully eclipsed the moon would appear to be cut in half. Possibly by a red line? Other effects of a flat earth would be daylight all over the upper side then darkness all over the upper side as we tumbled through space. Also what is on the underside and is there a Trumpesque wall round the edge to keep the water in? I recently read an article about gravity. On a flat earth the people on the edge would be lying down as the gravity would be pulling everyone towards the centre of the disc……
Anyway enough rambling