Declination is the angle from the Celestial Equator to the celestial body, measured North or South. It is the same as which terrestrial concept?

• A. Longitude (terrestrial)
• B. Latitude (terrestrial)
• C. Azimuth
• D. Right Ascension

Answer: (A)

Declination is the angular distance north or south of the celestial equator, which maps directly to latitude on Earth—the angular distance north or south of the Earth's equator. Longitude measures east–west position and has no north–south component, so it isn’t the right analogue. Azimuth is a horizontal bearing along the horizon, not a vertical separation from the equator. Right Ascension is like celestial longitude measured along the celestial equator, not latitude. So the terrestrial concept that matches declination is latitude.