While some scientists compare the strange objects left and right from Jesus’s head with the spaceships in which aliens used to travel, a majority of domestic experts agree that it is about the heavenly bodies. Serbian historians explain the art as a wish of a former artists to show the Sun and the Moon suffer because of the crucifixion of Jesus.
How about not aliens or the sun/moon (well, not exactly anyway...)?
The Jetsons car on the right has two eight pointed stars, which is Inanna/Ishtar's most common symbol (also equates to Venus). The fireball and it's driver on the left sure sounds like:
In Sumerian texts, Utu is described as "bearded" and "long-armed". In art, he is shown as an old man with a long beard. He was believed to emerge from the doors of Heaven every day at dawn and ride across the sky in his chariot before returning to the "interior of heaven" through a set of doors in the far west every evening.