diff --git a/practical_work/planets/skeleton/planet/planet.c b/practical_work/planets/skeleton/planet/celestial_body.c
similarity index 74%
rename from practical_work/planets/skeleton/planet/planet.c
rename to practical_work/planets/skeleton/planet/celestial_body.c
index 735290653cacaaf39ffdf054fd3d04efa6132b3c..94f0df20cf2661ca85e7466c27cbea2c3ec37886 100644
--- a/practical_work/planets/skeleton/planet/planet.c
+++ b/practical_work/planets/skeleton/planet/celestial_body.c
@@ -1,4 +1,4 @@
-#include "planet.h"
+#include "celestial_body.h"
 #include <stdlib.h>
 
 #define G 6.67e-11
diff --git a/practical_work/planets/skeleton/planet/planet.h b/practical_work/planets/skeleton/planet/celestial_body.h
similarity index 93%
rename from practical_work/planets/skeleton/planet/planet.h
rename to practical_work/planets/skeleton/planet/celestial_body.h
index 789da70978626802215c7ed6a93d85c85c7715bb..19fc38d5b8c38fc4137e905ba9dcc87ab6ac524a 100644
--- a/practical_work/planets/skeleton/planet/planet.h
+++ b/practical_work/planets/skeleton/planet/celestial_body.h
@@ -1,5 +1,5 @@
-#ifndef _PLANET_H_
-#define _PLANET_H_
+#ifndef _CELESTIAL_BODY_H_
+#define _CELESTIAL_BODY_H_
 
 #include "../vec2/vec2.h"
 #include "../gfx/gfx.h"