| 1) Title |
| Kepler's Laws - 2nd |
| 2) Button functions |
| Show/hide labels |
Switches the names of solar system objects
on and off. |
| Show/hide orbits |
Switches the orbits (orbital paths) of
planets satellites, and comets on and off. |
| Change scale |
Switches display of the celestial body
between actual size and magnified size. |
| Show Halley/Mercury |
Switches the displayed celestial body between
Mercury and Halley's comet. |
| << Month/sec |
Reverses time one month per second. Clicking
continuously accelerates the speed. |
| < Day/sec |
Reverses time one day per second. Clicking
continuously accelerates the speed. |
| [] Stop |
Stops time. |
| > Day/sec |
Forwards time one day per second. Clicking
continuously accelerates the speed. |
| >> Month/sec |
Forwards time one month per second. Clicking
continuously accelerates the speed. |
* Click the
button (initialization button) to show the view of the orbit of Mercury
from the top at 20:00 LT for the current date.
* Pressing a button to forward or reverse time (e.g. >>Month/sec)
continuously more than two times accelerates the speed. |