The prime vertical is the great circle on...

Question 1 / 2707066636ee928f7522a1c519eca

Question 1 of 2707066636ee928f7522a1c519eca

The prime vertical is the great circle on the celestial sphere that passes through the __________.

Question 1 of 27070

The prime vertical is the great circle on the celestial sphere that passes through the __________.

🔍 Key Concepts

• prime vertical as a specific great circle on the celestial sphere • relationship between zenith, nadir, and horizon points • difference between circles through celestial poles vs. circles through local vertical

💭 Think About

• Think about which points define your local vertical line in celestial navigation and how that projects onto the celestial sphere as a great circle. • Ask yourself: does the prime vertical depend on the celestial poles, or is it tied to your position and local horizon? • Visualize standing on Earth: which great circle goes straight over your head and straight under your feet, but crosses the horizon at the east–west points?

✅ Before You Answer

• Identify which choices involve zenith and nadir together (your local vertical). • Check which option correctly includes the east–west orientation of the prime vertical on the horizon. • Eliminate any choices that rely on celestial poles, since those define a different great circle (the celestial meridian).

Question 1 of 27070

The prime vertical is the great circle on the celestial sphere that passes through the __________.

zenith, nadir and the east point of the horizon

zenith, nadir and celestial body

celestial poles and the celestial body

celestial poles and the zenith

Question 1 / 2707066636ee928f7522a1c519eca

Question 1 of 2707066636ee928f7522a1c519eca

The prime vertical is the great circle on the celestial sphere that passes through the __________.

Back

Question 1 of 27070

The prime vertical is the great circle on the celestial sphere that passes through the __________.