In the study of Astronomy class high school Based on the truth. Knowledge of data sources from the data sources, there are a lot of theories from scientists. There is a lot to prove. From the learning of students will continue to come from the teachers, but also to trace the same information because the students grabbed most of the attention. What is more, such as the solar system, the stars. The orbit
การแปล กรุณารอสักครู่..
