diff --git a/sim_scenes/science/sun_earth_moon.py b/sim_scenes/science/sun_earth_moon.py
index c476ba76ad8b10154293dfedb22527d2019d27e3..80db7e9259080564ccbb8919b24cf32de31db336 100644
--- a/sim_scenes/science/sun_earth_moon.py
+++ b/sim_scenes/science/sun_earth_moon.py
@@ -62,7 +62,7 @@ if __name__ == '__main__':
     def on_timer_changed(time_data: TimeData):
         # 显示轨迹，并设置轨迹长度
         UrsinaConfig.show_trail = True
-        UrsinaConfig.trail_length = 500
+        UrsinaConfig.trail_length = 800
         # 设置运行速度（加速10倍）
         UrsinaConfig.run_speed_factor = 10