diff --git a/src/commands.rs b/src/commands.rs
index 3f49f8f..951acd4 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -258,7 +258,7 @@ pub fn load_defs(
                 state.is_vehicle = true;
             }
             ["moon", "yes"] => {
-                state.model_scale *= 6.0;
+                state.model_scale *= 3.0;
             }
             ["oxygen", amount] => {
                 if let Ok(amount) = amount.parse::<f32>() {
@@ -286,6 +286,16 @@ pub fn load_defs(
                     continue;
                 }
             }
+            ["radius", radius] => {
+                // like scale, just doubled size
+                if let Ok(radius_float) = radius.parse::<f32>() {
+                    state.model_scale = 2.0 * radius_float;
+                }
+                else {
+                    error!("Can't parse float: {line}");
+                    continue;
+                }
+            }
             ["rotationx", rotation_x] => {
                 if let Ok(rotation_x_float) = rotation_x.parse::<f32>() {
                     state.rotation *= Quat::from_rotation_x(PI * rotation_x_float);
diff --git a/src/defs.txt b/src/defs.txt
index 9801b14..b2be528 100644
--- a/src/defs.txt
+++ b/src/defs.txt
@@ -1,6 +1,6 @@
 actor 0 0 0 jupiter
     id jupiter
-    scale 71492e3
+    radius 71492e3
     sphere yes
     physics off
     rotationx -0.50
@@ -36,7 +36,7 @@ actor 10 -30 20 MeteorAceGT
 actor 0 0 0 io
     relativeto jupiter
     orbit 421700e3 0.75
-    scale 1822e3
+    radius 1822e3
     rotationy -0.40
     angularmomentum 0 0.0001 0
     sphere yes
@@ -46,7 +46,7 @@ actor 0 0 0 io
 actor 0 0 0 europa
     relativeto jupiter
     orbit 670900e3 0.35
-    scale 1561e3
+    radius 1561e3
     rotationy 0.20
     angularmomentum 0 0.0001 0
     sphere yes
@@ -56,7 +56,7 @@ actor 0 0 0 europa
 actor 0 0 0 ganymede
     relativeto jupiter
     orbit 1070400e3 0.93
-    scale 2634e3
+    radius 2634e3
     rotationy -0.40
     angularmomentum 0 0.0001 0
     sphere yes
@@ -66,7 +66,7 @@ actor 0 0 0 ganymede
 actor 0 0 0 callisto
     relativeto jupiter
     orbit 1882700e3 0.45
-    scale 2410e3
+    radius 2410e3
     rotationy -0.40
     angularmomentum 0 0.0001 0
     sphere yes