Thousands of satellites circle Earth. Some look down taking pictures andgathering all sorts of information about our planet. Others look out intospace toward th... » 

Thousands of satellites circle Earth. Some look down taking pictures andgathering all sorts of information about our planet. Others look out intospace toward the planets the Sun and the unknown worlds beyond our galaxy.In addition to recording what is seen satellites relay information that makeit possible to use phones watch TV predict the weather and much more. «