Show HN: I made a simple antipodal point navigator (github.com)

Inspired by Neil deGrasse Tyson's explanation of antipodal points: https://www.youtube.com/shorts/HJwZoQq0-a0

What are Antipodal Points? Antipodal points are two points on a sphere that are diametrically opposite to each other. On Earth, they are sometimes referred to as antipodes. If you were to draw a straight line from one point through the center of the Earth, it would emerge at the antipodal point.