Themis is one of the twelve Titan children of Gaia and Uranus in Greek mythology. Themis may also refer to: Space 24 Themis, an asteroid in the (main) asteroid belt THEMIS, a solar telescope located at the Teide Observatory Themis (hypothetical moon), a spurious tenth moon of Saturn THEMIS, Time History of Events and Macroscale Interactions during Substorms a constellation of five NASA satellites launched in 2007 Thermal Emission Imaging System (THEMIS), an instrument on the 2001 Mars Odyssey orbiter Europa Thermal Emission Imaging System (E-THEMIS), a version of the THEMIS camera flown on the Europa Clipper Themis programme, a European prototype of reusable launch system to fly around 2025 Other Protein THEMIS, a protein in humans, required for proper maturation of T cells Themis (alga), a genus of red algae in the family Bangiaceae Themis (solar power plant), a former solar power plant in Targassonne, France Themis, a local nymph of the Arcadia THeMIS, Tracked Hybrid Modular Infantry System, an unmanned ground vehicle built by Milrem Robotics The Themis Files, a book series by Sylvain Neuvel