I watched an animated movie on BBC2 in the late 70's or early 80's, I think it was Japanese in origin and dubbed in English, it had a btrother and sister on a space ship, they were important, they fell to a planet and had egg shaped communicators which helped guide them back to the ship, on their search they come across male angels and many different strange creatures. I know this is not a lot to go on but I am ever hopeful seeing your previous ansewers in other queries, Many thanks in advance.