Milestone 2 is basically about taking ASTRA from a working demo to a more complete learning tool, with things like extra satellites, better mission lessons, more detailed visuals, and useful features like saving or exporting your measurements.
Added ASTRA Guide, a built-in educational assistant. It can explain planets, orbital speed, orbital periods, Kepler-inspired motion, eccentricity, inclination, AU, simulation time, distances, and the model’s limits. Answers use the currently selected planet, simulation date, speed, and active distance measurement. Added suggested questions to help beginners know what to ask.
Milestone 3 will probably focus on making ASTRA more advanced and useful, with deeper mission-planning lessons, more satellites, better visuals, and tools for saving or exporting your measurements.