What great circle is always needed to form...

Question 1 / 2066636ee928f7522a1c519835

Question 1 of 2066636ee928f7522a1c519835

What great circle is always needed to form the astronomical triangle?

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Question 1 of 20

66636ee928f7522a1c519835

What great circle is always needed to form the astronomical triangle?

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🔍 Key Concepts

• Astronomical triangle (PZX triangle) and what its three vertices represent • Definition of a celestial meridian vs. prime meridian • Which great circle always passes through both the celestial pole and the zenith of the observer

💭 Think About

• Identify the three key points that make up the astronomical (PZX) triangle, then think about which great circle must always connect two of those points • Compare which of the listed circles depends on the observer’s position on Earth versus which are fixed by the Earth’s rotation or coordinate system • Ask yourself: which of these circles is defined for every observer, at every location, and is always part of the PZX triangle?

✅ Before You Answer

• Be clear on what the P (pole), Z (zenith), and X (celestial body) points are • Verify which option is a great circle that can pass through both P and Z for a given observer • Eliminate any circles that are fixed by longitude or latitude and do not necessarily go through the observer’s zenith

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Question 1 of 20

What great circle is always needed to form the astronomical triangle?

Prime Meridian

Celestial Equator

Celestial Meridian

Prime Vertical Circle

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Question 1 / 2066636ee928f7522a1c519835

Question 1 of 2066636ee928f7522a1c519835

What great circle is always needed to form the astronomical triangle?

Back

Question 1 of 20

66636ee928f7522a1c519835

What great circle is always needed to form the astronomical triangle?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed