Enhancement Suggestion: Add Support for ECI (Earth-Centered Inertial) Coordinates

[dickaitugm]

Hello,

I would like to suggest an enhancement to add support for ECI (Earth-Centered Inertial) coordinates.

This feature would be very beneficial for accurately visualizing and tracking celestial bodies, such as satellites, as their positions are often calculated in an ECI frame.

Thank you for considering this feature request.