‘Non est ad astra mollis e terris via’ – there is no easy passage from the Earth to the stars. Along the way, parties engaged in space activities might find themselves entangled in disputes. To facilitate the efficient settlement of such disputes, the Permanent Court of Arbitration has introduced the Optional Rules for Arbitration of Disputes Relating to Outer Space Activities. This article describes the key features of this special set of arbitration rules and how it supplements international space law and space disputes, so that the parties through arbitration can continue their journey to the stars.