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.
Those books were written by Homer.
Answer:
Keep both hands firmly on the wheel when you pass a large vehicle or when a large vehicle passes you. Don't speed up when a semi-truck or other large vehicle is passing you. Instead, stay to the right and slow down slightly.
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did fix Vedic voy backstretchgoo