This study presented the principal developments in Greek space law and highlighted Greece’s expanding role in the space sector, encompassing legislative, policy, and scientific dimensions. Significant progress is evident through Greece’s collaboration with European and international organizations, its accession to the Artemis Accords, and notable scientific advancements. For example, through strategic partnerships between the National Observatory of Athens (NOA) and the European Space Agency (ESA), several key achievements have been realized, including the successful evaluation of NOA’s Aristarchus 2.3m telescope by ESA, which has been selected as the first European Optical Ground Station (OGS) for optical satellite communications under the ARTES/Scylight program. Additional accomplishments include NOA’s involvement in the emblematic Psyche NASA mission to the asteroid 16-Psyche and its collaboration with HellasSat, Greece’s national satellite provider, in optics and quantum communications. These initiatives collectively underscore the dynamic evolution of the Greek space sector and reflect the country’s growing capabilities.