Transcript
The text "Optimistic aliens measure space typographically", with the initial "O" labeled as "Sun (not to scale), and the dots on the "i"s labeled as "Mercury", "Venus", "Earth", "Mars", "Jupiter". If you click anywhere, each letter starts orbiting the "O" at the beginning.
Caption: Space tip: If you're ever lost in the inner solar system, you can just type out the phrase "optimistic aliens measure space typographically" in Times New Roman and use the dots as a map.
Title text: Most of these letters are too dark to see in the night sky; only the "i"s are visible. That's because they have a reflective layer called a tapetum lucidum, which reflects more light and makes them appear to glow.