What does this poem mean
When I heard the learn'd astronomer,
When the proofs, the figures, were ranged in columns before me,
When I was shown the charts and the diagrams, to add, divide, and measure them, When I sitting, heard the astronomer, where he lectured with much applause in the lecture-room, How soon, unaccountable, I became tired and sick,
Till rising and gliding out, I wander'd off by myself,
In the mystical moist night-air, and from time to time, Look'd up in perfect silence at the stars
Give a short simple answer