diff --git a/ROADMAP.md b/ROADMAP.md
index d8f5e55..c6eb4c9 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -98,6 +98,7 @@ We are not quite there yet, but this is what I'm aiming for:
 A variety of relatively simple game systems should interact with each other to create emergent gameplay and interesting game mechanics.
 
 - Free movement in space
+- Everything orbits around Planets/Sun
 - Collision with other actors
 - Augmented Reality overlay
 - Targeting objects