We have developed the lessons to help students understand the motion of celestial objects easier than before by using Stellarium program. Stellarium is a free open source planetarium program that can be run on many computer platforms and also on a tablet. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors. The article will show the appropriate way to exploit the realistic graphic features of the program for the instructors who teach spherical astronomy.