Avastha simply means “state” . It is a state of a Graha, the way It feels, and consequently behaves. We can compare planets with people. Supposing a man was found in a miserable state, he wouldn’t be able to act in a healthy and efficient manner. On the other hand, if he feels hale and healthy, content or alert, his activities and impact on his surroundings would be positive and evolutionary. Sage Parasara dedicated the whole chapter to Avastha.