Just a simple example of circular orbits with sin() and cos().

creates a sphere and then orbits it around the origin given y(altitude) and speed#.

                                    ` This code was downloaded from The Game Creators
                                    ` It is reproduced here with full permission
                                    ` http://www.thegamecreators.com
                                    
                                    sync on:sync rate 0:set display mode 1024,768,32

radius#=1000
altitude#=20
speed#=0.1

make object sphere 1,100,32,32
position object 1,0,altitude#,radius#

do
  text 0,0,str$(screen fps())
  gosub c_orbit
  fastsync
loop

c_orbit:
  `find new x & z
  ox#=radius#*cos(oangle#)
  oy#=altitude#
  oz#=radius#*sin(oangle#)
  `restrict angle to 360 then add speed to it
  oangle#=wrapvalue(oangle#)
  oangle#=oangle#+speed#
  `position it duh :P
  position object 1,ox#,oy#,oz#
return