RelativityX

Fly a near-light-speed spacecraft through the solar system and watch time stretch.

Fly a spacecraft through a 3D solar system with the keyboard. Six speed modes, from subsonic toward light speed. Clickable planets with facts about each one. Free Camera option. Portal into a webring of other games. Earth time and ship time read the same at low speed. Accelerate and watch them drift…

Description excerpted from the original listing, which is linked below.