diff --git a/sim_scenes/science/jupiter_rocks.py b/sim_scenes/science/jupiter_rocks.py
index accee7d06d8b05f4e6d173f4c68a7c25f3607568..ae0c0d8634f50c92bc844b9e1cb225329e34e151 100644
--- a/sim_scenes/science/jupiter_rocks.py
+++ b/sim_scenes/science/jupiter_rocks.py
@@ -58,8 +58,6 @@ if __name__ == '__main__':
 
     def on_ready():
         camera_look_at(jupiter, rotation_z=0)
-        UrsinaConfig.trail_length = 150
-        UrsinaConfig.trail_type = "line"
 
 
     def on_timer_changed(time_data: TimeData):
@@ -68,8 +66,6 @@ if __name__ == '__main__':
                 rock.planet.rotation += rock.rotation
                 # 循环判断每个抛出物与木星是否相碰撞
                 if two_bodies_colliding(rock, jupiter):
-                    # 如果岩石与木星相碰撞了，则静止不动（岩石停止并忽略引力）
-                    rock.stop_and_ignore_gravity()
                     # 岩石爆炸
                     rock.explode(jupiter)
 
diff --git a/simulators/ursina_simulator.py b/simulators/ursina_simulator.py
index badc0caa9398abd3f088773357e1c817244fe7a9..c6051a3b0fdf426b8ddb0a72355251650ec0a00d 100644
--- a/simulators/ursina_simulator.py
+++ b/simulators/ursina_simulator.py
@@ -92,6 +92,8 @@ class UrsinaSimulator(Simulator):
         def body_explode(target=None):
             # from panda3d.core import GeomUtils
             if body.planet.enabled:
+                # 如果爆炸，则静止不动（停止并忽略引力）
+                body.stop_and_ignore_gravity()
                 body.planet.enabled = False
                 explosion_file = find_file("images/explosion")
                 explosion_file = os.path.join(explosion_file, "explosion")