In the horizon system of coordinates what is...

Question 1 / 2707066636ee928f7522a1c5198a3

Question 1 of 2707066636ee928f7522a1c5198a3

In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?

Question 1 of 27070

In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?

🔍 Key Concepts

• Celestial equator system (equatorial system) and what surface it uses on the celestial sphere • Horizon system of coordinates (altitude-azimuth system) and what basic great circle it is built on • Meaning of terms: vertical circle, prime vertical, and horizon

💭 Think About

• First, recall: in the celestial equator (equatorial) system, which great circle on the celestial sphere is the basic reference, similar to Earth’s equator? • Then ask: in the horizon system, which great circle on the celestial sphere plays a similar fundamental reference role for measuring positions? • Compare each choice: which of these is actually a great circle that forms the basic reference circle for altitude or azimuth in the horizon system?

✅ Before You Answer

• Verify which option is a great circle that is always 90° from the zenith-nadir line and passes all around the sky. • Check which circle in the horizon system is used as the zero reference for altitude measurements. • Confirm that the prime meridian and prime vertical are specific reference circles, but consider whether they are the primary fundamental circle for the entire horizon system.

Question 1 of 27070

In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?

Principal vertical circle

Prime vertical circle

Prime meridian

Horizon

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Question 1 / 2707066636ee928f7522a1c5198a3

Question 1 of 2707066636ee928f7522a1c5198a3

In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?

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Question 1 of 27070

In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?