This paper describes the development of an effective celestial learning system using virtual reality technology. Our system support a deep immersion and comfortable navigation by using HMD(Head Mounted Display) and 3 dimensional mouse. We make three dimensional celestial image dynamically with OpenGL and display the rendered image to HMD. Students can feel that they are on the space ship and navigate through the celestial body. During the navigation, students can get the information of each planet and solve given problems. Our system shows that virtual reality can be used as an effective tool for training and education.