The theories we know today, and the information we learn about the space weren't just suggested by a person and accepted right away. In fact, different people had different theories and ideas. These ideas went through modifications and sometimes were changed completely.
In this website, you will learn about the theories of a few important astronomers and will find out the differences between their ideas.
In this website, you will learn about the theories of a few important astronomers and will find out the differences between their ideas.