Why are the moon and the planets called non-luminous bodies?
What is meant by (a) luminous objects, and (b) non-luminous objects? Name two luminous objects and two non-luminous objects. State whether the moon is a luminous object or a non-luminous object.
Why are moon and planets considered as non-luminous objects.
Why do we call some nearby planets, like Venus to be a non-luminous body, although light comes out from those planets?