Merge pull request #51 from open-resources/Kipkeu-patch-4

Update LO_physics.yml

LO_physics.yml

@@ -616,6 +616,9 @@ Gravitation:
         - List the significant milestones in the history of gravitation.{445}
         - Determine the mass of an astronomical body from free-fall acceleration at its surface.{452}
         - Describe how the value of g varies due to location and Earth's rotation.{453}
+        - Understanding the concept of gravitational force and its role in determining the motion of celestial bodies.
+        - Apply the inverse square law of gravitation to explain how the gravitational force between the Sun and planets varies with distance.
+        - Relate the gravitation and celestial mechanics concepts to explain the interaction between the Sun, planets, and moons.
     Newton's Law of Gravity:
         - Calculate the gravitational force between two point masses.{446}
         - Estimate the gravitational force between collections of mass.{447}