
The Birth of the Milky Way (1668) by Peter Paul Rubens
The painting above, by Peter Paul Rubens, offers a different take on the Milky Way’s origins. I like it a lot better than Tintoretto’s which appeared last week. For one thing, it feels more real. There’s a story being told as your eye travels from element to element in the painting. But it’s not the same story as Tintoretto’s. It’s more direct and less busy. In Rubens’ painting Hera suckles baby Heracles willingly as Zeus fumes at her back, a bundle of lightning bolts at his feet, annoyed he isn’t paying attention to her. Heracles looks amazed at the size of Hera’s boob and so misses the stream of milk she squeezes, which turns into a glowing cloud at the lower left of the picture. In contrast, Tintoretto gives up just a few measly stars.
In addition to the cloud, Heracles and Hera are lowing with light, bringing them to front and center of the composition. In a nice touch, the dark shapes of Hera’s peacocks, which she uses to draw her chariot, look like the dark clouds in the center of the Milky Way that, in less light-polluted times, were more visible.
Like the myth, a planet’s view of the Milky Way can change depending on where it is placed and the tilt of its axis.
First, some basic astronomy.