Definition

1. Noun:
   • (Astronomy) Declination: In astronomy, celestial latitude is the angular distance of a celestial body (like a star or planet) measured north or south of the celestial equator. It is expressed in degrees, minutes, and seconds of arc. Along with right ascension, it is used to specify precise positions on the celestial sphere, analogous to latitude on Earth.

Usage Examples

• Noun:
  • The star's celestial latitude was measured at +45 degrees, placing it far north of the celestial equator.
  • To locate the nebula, you need both its right ascension and its celestial latitude.
  • Astronomers recorded a change in the comet's celestial latitude as it moved through the solar system.

Advanced Usage

• In Coordinate Systems: is a fundamental coordinate in the equatorial coordinate system, the primary system used for mapping objects in the sky.
  • The catalog lists thousands of stars with their precise celestial latitude and right ascension.

Variants and Related Words

• Declination (Dec.): This is the more common and standard term used synonymously with in modern astronomy.
• Celestial Equator: The great circle on the celestial sphere that is directly above the Earth's equator. is measured from this line.
• Right Ascension (RA): The celestial equivalent of longitude, used together with (declination) to define a position.
• Ecliptic Latitude: A different coordinate measured from the plane of the ecliptic (the Sun's path), not to be confused with .

Synonyms

• Declination
• Dec. (Abbreviation)

Notes on Meaning

• The term is technically correct but is largely synonymous with and often replaced by the more concise term declination in professional and amateur astronomy.
• It is part of a pair of coordinates. One coordinate (/declination) tells you how far north or south an object is, while the other (right ascension) tells you how far east it is along the celestial equator.

Noun

1. (astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere