update dir. light to actually come from the sun

thankfully we have only one star in the system, trisolaris would be
annoying to code

src/world.rs

@@ -8,7 +8,7 @@ use bevy::core_pipeline::bloom::{BloomCompositeMode, BloomSettings};
 use std::f32::consts::PI;
 
 const ASTEROID_SIZE: f32 = 100.0;
-const MOON_SIZE: f32 = 50.0;
+const MOON_SIZE: f32 = 200.0;
 const MARS_SIZE: f32 = 10.0;
 const ASTRONAUT_SIZE: f32 = 5.0;
 
@@ -114,9 +114,9 @@ pub fn setup(
             mesh: sphere_handle.clone(),
             material: gray_handle.clone(),
             transform: Transform::from_xyz(
+                2000.0,
                 0.0,
                 0.0,
-                -500.0,
             ).with_scale(Vec3::splat(MOON_SIZE)),
             ..default()
         },
@@ -217,12 +217,7 @@ pub fn setup(
             shadows_enabled: false,
             ..default()
         },
-        transform: Transform::from_rotation(Quat::from_euler(
-            EulerRot::ZYX,
-            0.0,
-            PI / 1.0,
-            -PI / 7.0,
-        )),
+        transform: Transform::from_rotation(Quat::from_rotation_y(PI/2.0)),
         cascade_shadow_config: CascadeShadowConfigBuilder {
             first_cascade_far_bound: 7.0,
             maximum_distance: 25.0,