|Left-click||Add a planet. Change menu.|
|[Color]||Change the color of a planet.|
"?" shows a random color.
|[Track]||Change the type of trajectory.|
line - short line
long line - long line
point - dotted line
non - hide
|[Target]||Add a planet to the selected direction.|
1.Click the mouse to locate a planet.
2.Drag the mouse to determine the direction.
3.Release the mouse.
|[Random]||Add a planet to a random direction.|
Click again to change the speed of the planet.
|[Circle]||Add a planet with a circular orbit.|
|[Size]||Change the size of a planet.|
|[Star]||Add and delete stars.|
By clicking the blank space you'll add the stars.
By clicking on the stars, you'll delete them.
|[Scale]||Change the scale of the screen.|
|[Speed]||Change the flow of the time.|
From 8 to 1/4 times speed. 0 stops the time.