2016-2017学年 人教版 必修三 Unit 4 Astronomy :the science of the stars Reading 课件 (9)
2016-2017学年 人教版 必修三  Unit 4 Astronomy :the science of the stars  Reading 课件 (9)第4页

Do you know any questions that astronomers are interested in?

●How did the universe begin? ● How did life begin? ● Is there life on other planets? ● Are there other life forms in the universe? ● What happened to all the matter after the “Big Bang”? ● What are “black holes”?