diff --git a/trick_sims/SIM_sun/README.md b/trick_sims/SIM_sun/README.md
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--- a/trick_sims/SIM_sun/README.md
+++ b/trick_sims/SIM_sun/README.md
@@ -1,6 +1,6 @@
 # SIM\_sun
 
-![Picture of Sun](images/sun.png)
+![Picture of Sun](images/CelestialSphere.png)
 
 ### The Simulation
 SIM\_sun is a simulation of the Sun's movement across the sky.
diff --git a/trick_sims/SIM_sun/images/CelestialSphere.png b/trick_sims/SIM_sun/images/CelestialSphere.png
new file mode 100644
index 00000000..8e316e59
Binary files /dev/null and b/trick_sims/SIM_sun/images/CelestialSphere.png differ