[luoc]

Too lazy to build it: Physically accurate bird view of the solar system at year zero of <INSTERT CALENDAR>. Grab whatever object with your mouse and move until reaching the desired point in time. Like grab Pluto to get somewhat near today, finetune with our Moon.

[jandrese]

One of the date pickers has an overhead shot of Earth's orbit and you have to wind the planet back to get to the date.