This book provides an overview of the Greek legislation applying to space activity under the responsibility of the Greek State, as in line with international space law. Greece is not an established space-faring country; however, it is showing particular dynamism, making the most of its participation in international and EU space endeavors. Indeed, along with outstanding achievements in space science Greece took legislative action both at the international and national levels (proposals at the UNCOPUOS; Greek space law; signing of the Artemis Accords). Hence, the time has come to refer to – and present aspects of – the Greek space legislation. After an introductory section, the book provides information first on the national laws providing for the Greek participation in international space systems and in EU activities, which could be regarded as being the initial steps of Greece in the context of space. Thereafter, the rules applying to Greek space activity per se are presented, focusing on the authorities competent to decide on space matters, then on the substantial law rules allowing for – and clarifying – the application of international space law to domestic space operations. This book presents an overall view and analysis of the Greek space legislation, adding valuable information to the existing bibliography. Included as an appendix is a scholarly translation of the 2017 Greek space law.