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noun(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
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nouna condition inferior to an earlier condition; a gradual falling off from a better state
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nouna downward slope or bend
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nouna polite refusal of an invitation
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Definition that contains declination
- ra (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
- celestial longitude (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
- isogonal line an imaginary line connecting points on the Earth's surface where the magnetic declination is the same
- declinometer an instrument for measuring magnetic declination
- isogonic line an imaginary line connecting points on the Earth's surface where the magnetic declination is the same
- isogone an imaginary line connecting points on the Earth's surface where the magnetic declination is the same
- right ascension (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
- agonic line an imaginary line connecting points on the Earth's surface where the magnetic declination is zero
- transit declinometer an instrument for measuring magnetic declination