1. Introduction2. Tectonic Landforms Across the Solar System3. Planetary Geomechanics4. Tectonics Caused by Surface Loads5. Tectonic-Magmatic Interaction6. Formation and Tectonic Modification of Impact Craters7. Convection-driven Tectonics8. Tectonics Caused by Changes in Planetary Volume9. Tectonics Caused by Changes in Figure10. Synthesis and Outlook