Priyadarshini Space Planetarium is part of the Kerala Science and Technology Museum complex, a short hop north of the city centre. It is not a grand historic sight, but it earns its place in Thiruvananthapuram because the shows are genuinely useful on a hot or rainy afternoon, especially if you are travelling with children or need a break from temples and palaces.
The dome presentations focus on astronomy and space science, and the museum campus around it adds hands-on science exhibits that make the visit feel less like a single-screen attraction. Pair it with the nearby Napier Museum and zoo precinct if you want a mixed day of culture, shade, and something more interactive.