Hamlet’s use of the word “sun” plays off Claudius’s reference to clouds, but it’s also a pun on the word “son” — he’s not comfortable with his new father-in-law.
He may also be saying that he is too much Claudius' son now, strongly implying that Claudius and Gertrude’s relationship is on the verge of incest.
The First Folio prints the word as “Sun,” while the Second Quarto presents it as “sonne.” Several modern editions print the word as “son.”
Also worth noting that the incidental conversation at the end of the play’s first scene is around “morning” and “the sun,” whereas this scene discusses “mourning” and a “son,” including this pun.
To help improve the meaning of these lyrics, visit “Hamlet Act 1 Scene 2” by William Shakespeare and leave a comment on the lyrics box