Study
17 And God set them in the firmament of the heaven to give light upon the earth,
'To open,' as in Revelation 9, signifies communication and conjunction.
(References: Apocalypse Explained 537)
17 Awake, Awake, stand up, Jerusalem, that have drunk at the hand of Yahweh the cup of his wrath; you have drunken the bowl of the cup of staggering, and drained it.