diff --git a/sim_scenes/solar_system/earth_moon.py b/sim_scenes/solar_system/earth_moon.py
index c8b81d83ab1fd6b1bdd57f33d62d9bfc2a3e3356..fb7e2c982e85af819fb61547233e9daee20bbc62 100644
--- a/sim_scenes/solar_system/earth_moon.py
+++ b/sim_scenes/solar_system/earth_moon.py
@@ -29,4 +29,4 @@ if __name__ == '__main__':
     # 使用 ursina 查看的运行效果
     # 常用快捷键： P：运行和暂停  O：重新开始  I：显示天体轨迹
     # position = 左-右+、上+下-、前+后-
-    ursina_run(bodies, SECONDS_PER_DAY, position=(-300000, 200000, -1300000), show_trail=True)
+    ursina_run(bodies, SECONDS_PER_MONTH, position=(-300000, 200000, -1300000), show_trail=True)
diff --git a/simulators/ursina/entities/planet.py b/simulators/ursina/entities/planet.py
index 6c12ff95030e18c4d309de0ca3d783bd47a70b99..09b324300772d9885c8efb0af4ddd41e4095499a 100644
--- a/simulators/ursina/entities/planet.py
+++ b/simulators/ursina/entities/planet.py
@@ -65,6 +65,7 @@ class Planet(Entity):
             rotation = (0, 0, 0)
 
         UrsinaEvent.on_reset_subscription(self.on_reset)
+        UrsinaEvent.on_body_size_changed_subscription(self.change_body_scale)
 
         super().__init__(
             # model="sphere",
@@ -100,16 +101,18 @@ class Planet(Entity):
             # 创建行星环（目前只有土星环）
             create_rings(self)
 
-    def update(self):
+    def change_body_scale(self):
         if hasattr(self.body, "torus_stars"):
             # 星环小天体群（主要模拟小行星群，非一个天体）不受 body_size_factor 影响
             self.scale = self.init_scale
         else:
             self.scale = self.init_scale * UrsinaConfig.body_size_factor
 
+    def update(self):
+        self.change_body_scale()
+
         pos = self.body_view.position * UrsinaConfig.SCALE_FACTOR
         if self.body.parent is None:
-            # TODO: ????????
             # self.x = -pos[1]
             # self.y = pos[2]
             # self.z = pos[0]
@@ -180,7 +183,6 @@ class Planet(Entity):
                     self.f_parent = b
                     break
         pos = self.f_parent.position * UrsinaConfig.SCALE_FACTOR
-        # TODO: ????????
         # self.x = -pos[1]
         # self.y = pos[2]
         # self.z = pos[0]
diff --git a/simulators/ursina/ui/control_handler.py b/simulators/ursina/ui/control_handler.py
index 2ac63034a462bb724548831f679724aeaef47d96..274122beb1de7c8c5bf2ca1cd762aaafdfd13df7 100644
--- a/simulators/ursina/ui/control_handler.py
+++ b/simulators/ursina/ui/control_handler.py
@@ -205,6 +205,7 @@ class ControlHandler(EventHandler):
 
     def on_slider_body_size_changed(self):
         UrsinaConfig.body_size_factor = self.ui.slider_body_size_factor.value
+        UrsinaEvent.on_body_size_changed()
 
     def on_slider_run_speed_changed(self):
         UrsinaConfig.run_speed_factor = self.ui.slider_run_speed_factor.value
diff --git a/simulators/ursina/ui_component.py b/simulators/ursina/ui_component.py
index 8f666c23042f7a2c406ed7913b4dbc0059995771..2ab63b81595ec8ad8608f07d11934c6710c65555 100644
--- a/simulators/ursina/ui_component.py
+++ b/simulators/ursina/ui_component.py
@@ -33,6 +33,7 @@ class UiSlider(Slider):
                          dynamic=True)
         # self.label.scale *= 8/10
         self.label.font = UrsinaConfig.CN_FONT
+        self.knob.ignore_paused = True
         # self.knob.text_entity.font = ""
         # self.knob.text_entity.scale *= 8/10
         # self.height *= 8/10
diff --git a/simulators/ursina/ursina_event.py b/simulators/ursina/ursina_event.py
index b04b515dbf600416567685048f8c4742fa34ae0e..68550a8a65bd07a124005225c522d02b684c8eba 100644
--- a/simulators/ursina/ursina_event.py
+++ b/simulators/ursina/ursina_event.py
@@ -24,6 +24,17 @@ class UrsinaEvent:
         UrsinaEvent.on_searching_bodies_funcs = []
         # 应用运行的订阅事件
         UrsinaEvent.on_application_run_callback = []
+        #
+        UrsinaEvent.on_body_size_changed_callback = []
+
+    @staticmethod
+    def on_body_size_changed_subscription(fun):
+        UrsinaEvent.on_body_size_changed_callback.append(fun)
+
+    @staticmethod
+    def on_body_size_changed():
+        for f in UrsinaEvent.on_body_size_changed_callback:
+            f()
 
     @staticmethod
     def on_application_run_callback_subscription(fun):