If they are overhead during the day, where are they at night?
Take a look at the diagram with all the gravity lines a couple of responses up from your question. Anything at points 1, 3, 4, and 5 will stay there, and as you will rotate to the opposite side of the Earth at night, you won’t be able to see them.
Your question is the same as, “If the Sun is overhead during the day, where is it at night?” We turn our back on it.