The presence of terms “constellation” and “watcher of stars” are strongly reminiscent of the centaur (since they watch stars to do their Divination) and then the “place that is prohibited” would further point to the Forbidden Forest, which could have misdirected Harry to think he should go there to help the centaur (very plausible given the cryptic nature of why the centaur tried to kill him at the same time he indicated he didn’t want to murder innocents; perhaps Harry needed to go there to find out the important and true reason for that incident). Weird that the possibility that the “watcher of stars” could be the centaur didn’t even cross his mind.
The presence of terms “constellation” and “watcher of stars” are strongly reminiscent of the centaur (since they watch stars to do their Divination) and then the “place that is prohibited” would further point to the Forbidden Forest, which could have misdirected Harry to think he should go there to help the centaur (very plausible given the cryptic nature of why the centaur tried to kill him at the same time he indicated he didn’t want to murder innocents; perhaps Harry needed to go there to find out the important and true reason for that incident). Weird that the possibility that the “watcher of stars” could be the centaur didn’t even cross his mind.
Also “bloody” stupid could refer to unicorn blood, I.e. the forbidden forest.