MinigamePythonIntermediate Relativistic flight at 0.9 c: aberration, Doppler colors, and the twin clocks at = {body: get_body_barycentric(body, DEPARTURE).xyz.to_value(u.au)
MinigamePythonBeginner Retrograde Mars: why it stops and loops backward through the stars d = ecliptic((get_body_barycentric("mars", tm) - get_body_barycentric("earth", tm)).xyz.to_value("AU"))