Welcome to the Geometry of Space Navigation learning package. Geometry, the branch of mathematics that deals with shapes and sizes, finds particular relevance and importance within the context of space navigation. Geometry relates to spatial sense or spatial visualization and helps us to better understand the world in which we live. On Earth, knowledge of geometry allows us to determine our location and orientation with our surroundings. Geometry is also important in space exploration, as we attempt to navigate and orient our spacecraft to an intended destination.