This is a diagram demonstrating the density of Jupiter’s layers. There is a segment in the shape of an upside down triangle at the top of the image, with different shades of blue, the darkest being at the top and the lightest shade at the bottom. There are four different shades, labelled on the left-hand side from the bottom: M4, M3, M2, M1. There is a red dashed line running down the middle, from top to bottom, labelled RJ. On the right-hand side, there is the label at the top: density (g/cm3), with the following numbers at each different shade, from the bottom to the top: ~25, ~4, 1.0, 0.5 and the top right edge of the section has 0.0002. Below this, there is a diagram of Jupiter, with a segment cut away displaying the core. There is a dashed line coming from the core to the edge, labelled RJ. From the outer edge to the core there are four labels: gaseous hydrogen, mass M1 density <0.5 g/cm3; liquid hydrogen, mass M2 density 1 g/cm3; metallic hydrogen, mass M3 density 4 g/cm3; core of rocks and metals, mass M4 density 25 g/cm3.