Cirondo (1991)

Played on a round board the object of the game is to eliminate your opponent(s) whilst remembering the game is about offense, defense and sacrifice.
You are to advance forward one space at a time with your moons, whilst defending them with your planets and setting up strategies to attack your opponent(s) stellars. When the moon reaches the inner ring it is sucked into the void and exchanged for a solar system. The solar systems are the most powerful stellar which every player is aiming to get. The planets are defending pieces which can only move in arcs around the board.
A great strategy game for 2 or 4 players or 2 teams of two.