Not all the transitions are linear. In the cases where they are, it's obviously a design choice. It might be that because they're moving fast that you perceive

Not all the transitions are linear. In the cases where they are, it's obviously a design choice. It might be that because they're moving fast that you perceive it that way. But most of the animations have easing. Ease in and out on almost all the animation styles. http://mozillademos.org/demos/planetarium/css/style.css http://mozillademos.org/demos/planetarium/css/style.css