It relates to an overview of The Sun and the path taken in a roundabout way (7)
I believe the answer is:
orbital
Can you help me to learn more?
(Other definitions for orbital that I've seen before include "(Of a road) going around a town" , "Relating to planet's motion" , "Relating to a planet's or a moon's track" , "Like a sort of road" , "(Of a road) going round a town" .)