The video shows a chart of the moons of the solar system, with each moon's name and size labeled. The chart includes Jupiter, Saturn, Uranus, Neptune, and Earth, with their respective moons such as Io, Europa, Tethys, Dione, Miranda, Puck, Proteus, Triton, Nereid, Titan, Hyperion, Callisto, Lapetus, Phoebe, and Earth. The video also includes text that provides information about the size of Titan, which is the second-largest moon, and compares it to the size of Mercury, the smallest planet. The text states that Titan is 0.77 times the diameter of 5,268 km and 1.02 times the size of 1,081 km.