This section shows the date for the simulation (as "Day/Month/Year"). You can type in a new date and press Update to move to a new time. You can go back to today by clicking on the Today button. You can look at any day from 1900 to 2100 AD.
Because the Solar System is a very large place, you cannot see all of it on one view - the dwarf planet Pluto is 100 times further away from the Sun than Mercury. The Field of View buttons let you choose which planets you want to see.
By clicking on the buttons in the Animate section, you can go both forwards and backwards in time. There are three buttons for going forward at different speeds:
The Key shows you which planet is which on the screen. You can find out more about each of the classical planets and the dwarf planet Pluto from the Solar System section of the Astronomy section. Note that the sizes of the orbits of the planets are to scale, the planets themselves are not.