diff --git a/simgear/ephemeris/moon.cxx b/simgear/ephemeris/moon.cxx
index d109942a..144e7ad5 100644
--- a/simgear/ephemeris/moon.cxx
+++ b/simgear/ephemeris/moon.cxx
@@ -329,7 +329,7 @@ void Moon::newImage()
   /*double x_2, x_4, x_8, x_10;
   GLfloat ambient;
   GLfloat amb[4];*/
-  int moonSize = 750;
+  int moonSize = 550;
 
   GLfloat moonColor[4] = {0.85, 0.75, 0.35, 1.0};
   GLfloat black[4] = {0.0, 0.0, 0.0, 1.0};
diff --git a/simgear/ephemeris/star.cxx b/simgear/ephemeris/star.cxx
index e41c7eaf..0e6e9ad4 100644
--- a/simgear/ephemeris/star.cxx
+++ b/simgear/ephemeris/star.cxx
@@ -203,7 +203,7 @@ void Star::newImage(void)
     double x_2, x_4, x_8, x_10;
     GLfloat ambient;
     GLfloat amb[4];
-    int sun_size = 750;
+    int sun_size = 550;
     
     // daily variation sun gets larger near horizon
     /*if(sun_angle*RAD_TO_DEG > 84.0 && sun_angle*RAD_TO_DEG < 95)