🔍 Key Concepts

• apparent daily motion of celestial bodies caused by Earth's rotation • Difference between a body's daily path and the Sun's yearly path (ecliptic) • Meaning of terms like altitude and circle of position in celestial navigation

💭 Think About

• Which option refers specifically to a body’s path over a single day due to Earth’s rotation, rather than over a year? • Which choices are associated with lines or circles used for position fixing in celestial navigation rather than describing the body’s full apparent path? • Look at the root words (like "diurnal" or "ecliptic"); what time scales or motions do those words suggest?

✅ Before You Answer

• Make sure the term you pick is tied to daily motion, not yearly motion • Eliminate any answers that are specifically about observer’s position or equal altitude lines on Earth rather than the body’s path in the sky • Verify that the remaining term is defined as the body’s full apparent track across the celestial sphere in one rotation of the Earth