Resumen
(1) Background: Space tourism (ST) is an emerging frontier in tourism, attracting considerable stakeholders in the era of the New Space Economy. Thus, understanding the intentions and the characteristics of future space travelers is crucial. (2) Methods: Here, we validated the brief 11-item Space Tourism Propensity Questionnaire (STP-Q) and administered it, along with sociodemographic and psychological questionnaires, to 333 undergraduates in order to explore ST propensity and predictive factors. (3) Results: Linear regression analysis revealed that STP-Q scores are influenced by personality traits, particularly sensation seeking, social distance, and conscientiousness. Sensation seeking predicts the intention to engage in future space travel, while trait anxiety negatively impacts it. Surprisingly, neither sociodemographic features nor pro-environmental behaviors predict ST propensity, as expected. (4) Conclusions: The STP-Q is a cost-effective self-report for assessing ST propensity and can contribute to the evolving field of space tourism when used in combination with other questionnaires.