diff --git a/src/main/java/cr0s/warpdrive/data/CelestialObject.java b/src/main/java/cr0s/warpdrive/data/CelestialObject.java
index ce3ba298..4c63baf1 100644
--- a/src/main/java/cr0s/warpdrive/data/CelestialObject.java
+++ b/src/main/java/cr0s/warpdrive/data/CelestialObject.java
@@ -278,10 +278,10 @@ public class CelestialObject implements Cloneable, IStringSerializable {
 			case "normal"          : return GRAVITY_NORMAL;
 			default:
 				final double gravity = Double.parseDouble(stringGravity);
-				if (gravity < 0) {
+				if (gravity < 0.0D) {
 					throw new RuntimeException();
 				}
-				return gravity;
+				return Math.min(gravity, 1.0D);
 			}
 		} catch (Exception exception) {
 			WarpDrive.logger.error("Invalid gravity value, expecting none, legacySpace, legacyHyperspace, normal or a positive double. Found: " + stringGravity);
diff --git a/src/main/resources/config/celestialObjects-default.xml b/src/main/resources/config/celestialObjects-default.xml
index 119d4198..60c24b18 100644
--- a/src/main/resources/config/celestialObjects-default.xml
+++ b/src/main/resources/config/celestialObjects-default.xml
@@ -25,7 +25,7 @@
 		  dimension defines an actual game world. If it's missing, that celestialObject remains visible but you can't "land" on it.  
 		  dimension.id: this is the id of the dimension. 0 is the Overworld, -1 is the Nether, 1 is the End.
 		  dimension.isBreathable: this is a boolean flag defining if ambient atmosphere is breathable.
-		  dimension.gravity: this is the gravity simulation type. 0 is vanilla, 1 is space, 2 is hyperspace.
+		  dimension.gravity: this is the gravity simulation type. Valid keywords are none (0.0), legacySpace, legacyHyperspace, normal (1.0).
 		  dimension.center.x, dimension.center.z: those are the center coordinate of that dimension world border, measured in blocks. For convenience, it's usually 0, 0.
 		  dimension.isProvidedByWarpDrive (optional): this is a boolean flag defining if WarpDrive provides this dimension or not.
 		  Currently only Space and Hyperspace can be provided: use other mods to generate planet world.