diff --git a/sim_scenes/func.py b/sim_scenes/func.py
index 6a93a47e3dcd23d74c7076c58bcb4b74ad1311f1..8c921ce6c59b9e0f1c75616cd1ce05e70bfefe15 100644
--- a/sim_scenes/func.py
+++ b/sim_scenes/func.py
@@ -64,7 +64,8 @@ def ursina_run(bodies,
                show_grid=True,
                show_trail=False,
                show_name=False,
-               save_as_json=None):
+               save_as_json=None,
+               view_closely=False):
     """
 
     :param bodies: 天体
@@ -144,7 +145,12 @@ def ursina_run(bodies,
     sys.modules["__main__"].update = callback_update
     if show_trail:
         UrsinaConfig.show_trail = show_trail
-    simulator.run(dt, light=light, cosmic_bg=cosmic_bg, show_grid=show_grid, bg_music=bg_music)
+    simulator.run(dt,
+                  light=light,
+                  cosmic_bg=cosmic_bg,
+                  show_grid=show_grid,
+                  bg_music=bg_music,
+                  view_closely=view_closely)
 
 
 def mpl_run(bodies, dt=SECONDS_PER_WEEK, gif_file_name=None, gif_max_frame=200):
diff --git a/sim_scenes/solar_system/hd_mercury.py b/sim_scenes/solar_system/hd_mercury.py
index cb81dad122f2074e0e8978078ee2782aa0315c95..12b2bc43a5afb588aa837137d80b4a181fdf6acf 100644
--- a/sim_scenes/solar_system/hd_mercury.py
+++ b/sim_scenes/solar_system/hd_mercury.py
@@ -22,4 +22,6 @@ 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=(0, 30000, -800000), cosmic_bg="textures/cosmic1.jpg")
+    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 30000, -800000),
+               # cosmic_bg="textures/cosmic1.jpg",
+               view_closely=True)
diff --git a/sim_scenes/solar_system/hd_pluto.py b/sim_scenes/solar_system/hd_pluto.py
index d0f4ae644340ec8c993c5e46b721b96c87ebc55b..42838e363ee4a0b202963458c4b863652b95f97c 100644
--- a/sim_scenes/solar_system/hd_pluto.py
+++ b/sim_scenes/solar_system/hd_pluto.py
@@ -22,4 +22,6 @@ 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=(0, 10000, -450000), cosmic_bg="textures/cosmic1.jpg")
+    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 10000, -450000),
+               # cosmic_bg="textures/cosmic1.jpg",
+               view_closely=True)
diff --git a/sim_scenes/solar_system/hd_venus.py b/sim_scenes/solar_system/hd_venus.py
index 13925cb7cdb52c0a254db92b52cdaddf1845924a..fd2aa5838ad5f994d1b3f497915483694fad0586 100644
--- a/sim_scenes/solar_system/hd_venus.py
+++ b/sim_scenes/solar_system/hd_venus.py
@@ -22,4 +22,6 @@ 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=(0, 30000, -1500000), cosmic_bg="textures/cosmic1.jpg")
+    ursina_run(bodies, SECONDS_PER_DAY, position=(0, 30000, -1500000),
+               # cosmic_bg="textures/cosmic1.jpg",
+               view_closely=True)
diff --git a/simulators/ursina_simulator.py b/simulators/ursina_simulator.py
index 1d3477fce946006c5f9a21cc0e510093f0f5bea6..9343a6af4d4b339618dd0cb8901847df9ebf6e50 100644
--- a/simulators/ursina_simulator.py
+++ b/simulators/ursina_simulator.py
@@ -164,7 +164,12 @@ class UrsinaSimulator(Simulator):
         """
         # Add skybox
         from ursina import Sky
-        Sky(texture=texture).scale = 10000
+
+        sky_scale = 50000
+        Sky(texture=texture).scale = sky_scale
+        # 一定要够大，如果小于 Sky(texture=texture).scale = 50000，宇宙背景就会出现黑色方洞
+        if camera.clip_plane_far < sky_scale * 2:
+            camera.clip_plane_far = sky_scale * 2
 
         # texture = load_texture(texture)
         # sky_dome = Entity(model='sky_dome', texture=texture, scale=10000,
@@ -232,11 +237,18 @@ class UrsinaSimulator(Simulator):
     def run(self, dt, **kwargs):
 
         window.title = '宇宙模拟器'
+        view_closely = False
+        if "view_closely" in kwargs:
+            view_closely = kwargs["view_closely"]
+
+        if view_closely:
+            # 设置 camera 的裁剪面和位置
+            camera.clip_plane_near = 0.01
+            camera.fov = 60
+
+        # 一定要够大，如果小于 Sky(texture=texture).scale = 50000，宇宙背景就会出现黑色方洞
+        # camera.clip_plane_far = 100000
 
-        # 设置 camera 的裁剪面和位置
-        camera.clip_plane_near = 0.01
-        camera.fov = 60
-        camera.clip_plane_far = 50000
         # camera.position = (0, 10, -20)
         # camera.rotation_x = -30