Answer:
The word "protracted" means lasting longer than expected, or unusually long, so what protracted most clearly means based on the context of the excerpt is how the time period of celestial motion studies must have lasted unusually long.
Match these items.
1. tone - the attitude of a piece of writing
2. theme - the main idea of a text
3. motif - a distinctive feature in a text
4. imagery - visually descriptive language
5. Shakespearean sonnet - a poem with fourteen lines
Because copper is expensive and there are better alternatives
HUMAN COMPASSION INFORMS OUR UNDERSTANDING OF THE WORLD IN MANY WAYS AN EVERY SHAPE AN FORM OF MEMORIES,AN THINGS WE AS PEOPLE HAVE BEEN THROUGH LIKE FOR EXAMPLE BEING A MOTHER LOOKING AT ANOTHER PERSONS CHILD KNOWING THINGS THEY HAVE DELT WITH AN GOING THROUGH AND ARE GOING TO GO THROUGH SO PEOPLES UNDERSTANDING OF THE WORLD ALWAYS BOIL DOWN TO LEARNING THAT EVERYTHING IS ALWAYS NEW AN OLD TO EVERYONE AROUND US SO WE ALL ARE LEARNING NEW THINGS EVERY DAY AND UNDERSTANDING THE COMPASSION OF ANOTHER HUMANS CHANGES.