Haleakalā Observatory is an observation site located near the visitor center. It lies above the tropical inversion layer and so experiences excellent viewing conditions and very clear skies. For over 40 years, the University of Hawaii Institute for Astronomy has managed this site, conducting dedicated astrophysical experiments. One of its missions, the Maui Space Surveillance System (MSSS), tracks satellites and debris orbiting the Earth. The buildings are on a gated road just past the summit and are not within the park boundary.