The Gravity Crystal located in Timber Hearth's Observatory.
A Gravity Crystal is a piece of Nomai technology that alters gravity within a certain radius, allowing the user to walk on any surface, regardless of whether or not they are in zero gravity, or if they are affected by the gravity of another object.
A Gravity Crystal is located aboard The Protagonist's spaceship, which allows them to walk around normally while onboard no matter the orientation of the ship. Gravity crystals are also commonly used on Brittle Hollow, to prevent inhabitants from falling into the Black Hole in the center of the planet.
The Nomai also utilized gravity panels, special types of flooring that were used to create walkways with a similar effect to that of a gravity crystal.