Answer:
By experiencing it directly
Explanation:
He leaves the astronomer's class to go look at the stars himself, which he found to be a better experience then just listening to someone talk about them.
Answer:
It makes the imagined addressee feel more present to the reader.
Explanation:
In this poem, the author refers to his addressee as a "master poet." This master poet is most likely God. The author tells us that he cannot be "vain" and believe himself to be a good poet when he looks at how talented God is. He feels humbled by God's power and the beauty of his creations. By referring to God as another poet, the author makes Him feel more present to the reader.
Are you speaking about the Greek mythology?