Yes, ORRERIES is a Scrabble word!

Letter values in Scrabble US: O 1, R 1, R 1, E 1, R 1, I 1, E 1, S 1.

Is it a valid word?

ORRERIES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

planetarium consisting of an apparatus that illustrates the relative positions and motions of bodies in the solar system by rotation and revolution of balls moved by wheelwork; sometimes incorporated in a clock