How Are Declination and Right Ascension Measured in the Celestial Sphere?

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Declination in the celestial sphere is measured in degrees north or south of the celestial equator, similar to how terrestrial latitude is measured on Earth. Right Ascension (RA) is measured in hours, minutes, and seconds from the First Point of Aries, which marks the point where the sun crosses the celestial equator in spring, analogous to terrestrial longitude. Visual aids can enhance understanding of these concepts, as the measurements are complex to describe without diagrams. For further clarification, resources like the Wikipedia page on the Equatorial Coordinate System can be helpful. Understanding these measurements is essential for navigating and mapping the night sky.
astroboy17
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I have two questions I cannot figure out:

How is declination measured in the celestial sphere, in comparison with how terrestrial latitude is measure on earth

How is RA measured in the celestial sphere, in comparison with how terrestrial longitude is measure on earth.

Thanks!
 
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