diff --git a/todo.md b/todo.md
index 6eed650..3b84496 100644
--- a/todo.md
+++ b/todo.md
@@ -42,5 +42,9 @@ Argument of Periapsis
 
 Hypothesis: The shifting in position is caused by a the change in the argument of periapsis which is not accounted for when updating the orbit
 
-Test: Update the velocity such that the apo- and periapses of the orbit swap sides. This would cause the particle to jump to the other side of the planet
+What happens when the initial orbit is circular?
+
+Test: Update the velocity such that the apo- and periapses of the orbit should swap sides. This should cause the particle to jump to the other side of the planet.
 Test: Position the particle exactly at the apo- or periapsis before updating the velocity. The particle should remain stationary.
+
+