In the celestial equator system of...

Question 1 of 2707066636ee928f7522a1c5192b1

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

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Question 1 of 27070

Q

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

🔍 Key Concepts

• Celestial equator system as the sky-version of Earth’s latitude/longitude grid • On Earth: meridians run pole-to-pole and measure longitude • In the sky: identify which circles run through the celestial poles and are used with right ascension

💭 Think About

• First match the analogy: declination on the celestial sphere corresponds to which Earth coordinate, latitude or longitude? • Once you know that, ask: are meridians more like lines of equal latitude or lines of equal longitude? • Look at each choice and ask: which one forms great circles passing through both celestial poles, similar to meridians passing through Earth’s poles?

✅ Before You Answer

• Be sure which option is used together with right ascension in the celestial equator system • Confirm which option forms great circles through the celestial poles, not horizontal or local circles • Eliminate any option that better matches parallels of latitude rather than meridians of longitude