A special lecture was organized for the students of the Society for Engineering and Development Studies (SEDS) at Kotelawala Defence University, featuring the esteemed participation of Aravinda Ravibhanu, a renowned astrobiologist. The session delved into the Applications of Multidisciplinary Astronomy, Space Science, and Planetary Sustainability: Challenges and Opportunities, providing students with valuable insights into the interdisciplinary nature of these fields. The discussion highlighted the critical role of integrating astronomy and space science with sustainability efforts, addressing both the challenges and opportunities in advancing planetary health and exploration. This engaging lecture not only enriched the students’ understanding but also inspired them to explore innovative solutions for the future of space science and sustainability.