Venus is much hotter than earth, it is actually the hottest planet in the solar system.
Treasure in the first usage means precious gems like gold or silver . In its second use, it means to value something.
Hope this helps. We could help more if I had the poem for sure posted here but this is the meaning from the poem I think you are talking about.
Have a great day!
Wheres the text? . . . . . .
