fn main() {
let earth = moons::interactions::earths::ensure_earths_binary_or_simulate();
let composition = moons::exosphere::species::reference_composition();
let charging = moons::exosphere::charging::SurfaceCharging::dayside();
println!(
"mode={:?} earth_r_km={:.1} species={} potential_v={:.2} dust_risk={:.4}",
earth.mode,
earth.orbital_radius_km,
composition.len(),
charging.surface_potential_v(),
charging.dust_lofting_risk(),
);
}