The scene below takes place in Matthew 17 when Jesus personifies the sun in Libra. The presence of Corona Borealis, the Northern Crown, tells us that the transiguration represents Jesus' coronation. It is not clear which apostles are represented by Ophiuchus and Bootes.
The sun is also in Libra when Jesus enters Jerusalem, Matthew 21. According to Matthew, the prophecy of a coming king riding on an ass and a colt can now be fulfilled. As explained here, the so-called prophecies had nothing to do with Jesus; and he mistread Zechariah to mean an ass and a colt. Try to imagine a man riding on an ass and a colt at the same time.
4This took place to fulfill what was spoken by the prophet, saying,
5“Tell the daughter of Zion, Behold, your king is coming to you, humble, and mounted on an ass, and on a colt, the foal of an ass.” (Matt. 21:4-5)
Usually when we see the phrase "high mountain," that's a tip-off that the event takes place somewhere in the Zodiac. The idea of a mountain comes from the arc path of the sun. The cloud represents the Milky Way. Moses and Elijah also have their place in the sun.
12 3 4 5 6 7 8 (Matt. 17:1-7)
At Jesus' first trial, he is asked if he is the King of Jews.
11“You have said so.” (Matt. 27:11)
Note the similarity between the astronomical image here and Raphael's Transfiguration below.