diff --git a/data/tri_bodies_sim_perfect_01.json b/data/tri_bodies_sim_perfect_01.json
index 1621d4239bd758b3c4df0271b5d0e04bf449c7d5..122d09d00b8dd20f7cade71e9bcc90b84c4f07a2 100644
--- a/data/tri_bodies_sim_perfect_01.json
+++ b/data/tri_bodies_sim_perfect_01.json
@@ -21,7 +21,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     },
     {
       "name": "绿轨太阳B",
@@ -44,7 +45,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     },
     {
       "name": "蓝轨太阳C",
@@ -67,7 +69,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     },
     {
       "name": "流浪地球",
diff --git a/data/tri_bodies_sim_perfect_02.json b/data/tri_bodies_sim_perfect_02.json
index be003294da2058f28ccad6f77db366834c3e74a8..b7b5ded5086e80dddefeb0ad1464e2e71df8ef87 100644
--- a/data/tri_bodies_sim_perfect_02.json
+++ b/data/tri_bodies_sim_perfect_02.json
@@ -21,7 +21,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     },
     {
       "name": "绿轨太阳B",
@@ -44,7 +45,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     },
     {
       "name": "蓝轨太阳C",
@@ -67,7 +69,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     }
   ],
   "params": {
diff --git a/data/tri_bodies_sim_perfect_03.json b/data/tri_bodies_sim_perfect_03.json
index 2ac375f95269ec65902ce87a6db230ba2fdf2aba..e7dfe558106ca89b7cff1ac0a072b63f39b457a9 100644
--- a/data/tri_bodies_sim_perfect_03.json
+++ b/data/tri_bodies_sim_perfect_03.json
@@ -21,7 +21,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     },
     {
       "name": "绿轨太阳B",
@@ -44,7 +45,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     },
     {
       "name": "蓝轨太阳C",
@@ -67,7 +69,8 @@
       ],
       "texture": "sun2.jpg",
       "size_scale": 50.0,
-      "distance_scale": 1.0
+      "distance_scale": 1.0,
+      "is_fixed_star": true
     }
   ],
   "params": {