In the celestial equator system of...

Question 1 / 2707066636ee928f7522a1c5192b0

Question 1 of 2707066636ee928f7522a1c5192b0

In the celestial equator system of coordinates what is NOT equivalent to the longitude of the Earth system of coordinates?

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Question 1 of 27070

In the celestial equator system of coordinates what is NOT equivalent to the longitude of the Earth system of coordinates?

🔍 Key Concepts

• Celestial equator system vs. horizon system of coordinates • How hour angle and sidereal hour angle (SHA) relate to longitude • Meaning of symbols: Zn, SHA, LHA, and t in standard sight-reduction tables

💭 Think About

• Ask yourself: which of these quantities is measured around the celestial equator, similar to how longitude is measured around the Earth? • Which option is associated instead with the observer’s horizon (direction to the body) rather than with its position projected on the celestial equator? • For each symbol, recall whether it is an angle of direction (bearing/azimuth) or an hour angle (position on the celestial equator).

✅ Before You Answer

• Verify which of the options represents an azimuth (Zn) in the horizon system, not a celestial equator coordinate. • Confirm that SHA, LHA, and t are all types of hour angles measured westward along the celestial equator. • Before choosing, make sure the one you pick is the only quantity not defined on the celestial equator but instead in a different coordinate system.

Question 1 of 27070

In the celestial equator system of coordinates what is NOT equivalent to the longitude of the Earth system of coordinates?

SHA

LHA