601) It is the arc of the horizon measured either clockwise or counterclockwise through 180deg starting at the north point of the horizon in ht North latitude and the South point of the horizon in South latitude Meridian angle
602) The navigational triangle is NOT formed when the body is. on the observers meridian
603) The navigational triangle is NOT formed when the body is__________. on the observer's meridian
604) The extension of the earth's equator to the celestial sphere _________ Equinoctial
605) Vertical circle which passes through the east and west point of the horizon Prime vertical circle
606) What should be the label of azimuth angle of a body, on the East meridian, to an observer in the North latitudes? N-E
607) The sun will stay on the horizon the whole day if the observer is at the __________. North Pole on or about June 21
608) The proper way to express magnitudes is thru__________. number
609) The angular distance of the body above the rational horizon. An arc of the vertical circle which passes through the body contained between the rational horizon and the body is called_______ diurnal circle
610) The angular distance from a celestial pole, and is usually considered to be a complement of declination Polar distance
611) A vertex of the navigational triangle is NOT located at the __________. coaltitude
612) An amplitude of the Sun in high latitudes __________. is most accurate when the Sun's center is observed on the visible horizon
613) Concerning a celestial observation, the azimuth angle is measured from the principal vertical circle to the ____________ . vertical circle of the body
614) Opposition occurs when __________. the Earth is between a planet and the Sun
615) The accuracy of an azimuth circle can be checked by __________. comparing observed azimuths at different altitudes with computed values at the times of observation to see if the difference is constant
616) The change in the length of the day becomes greater as latitude increases because of the __________. increased obliquity of the Sun's diurnal circle
617) The radius of a circle of equal altitude for a body equals the body's __________. zenith distance
618) The GP of a body for a high altitude sight is determined from the Greenwich hour angle and the __________. declination
619) If the observer is at lat 50 degrees, declination of the sun is 15 degrees N, which of the following is observed? Daylight and darkness are the same.
620) The vernal equinox is he position of the sun on the celestial sphere on or about 21-Mar
621) The nodes of the moon's orbit regress westward around the ecliptic at an average of 16 degrees per year. This westward regression of the nodes which is due to gravitational forces acting on the moon has a cycle of 18.6 days
622) The node of the moon's orbit regress westward around the ecliptic at an average of 19 per year. This westward regression of the nodes which is due to gravitational forces acting on the moon has a cycle of __________._ 18.6 years
623) What is the altitude after applying the dip and index error of the sextant? Apparent altitude
624) The angular distance of a celestial body north or south of the celestial equator measured along the hour circle of the body is known as declination
625) The change in the length of the day becomes greater as latitude increases because of the _____________? increased obliquity of the Sun's diurnal circle
626) The angular distance from the equator, measured north or south along any meridian from the equator at 0 deg to maximum 90 deg at the poles latitude
627) The angular distance from the equator; measured north or south along any meridian from the equator at 0 degree to maximum 90 degrees at the poles. latitude
628) The vernal equinox is the position of the sun on the celestial sphere on or about March 21
629) What is the great circle of the celestial sphere that passes through the Zenith, the Nadir and the eastern point. prime vertical
630) The co-latitude (PZ) is line of the astronomical triangle which is derived from the celestial equator system
631) The distance of the body above the rational horizon. An arc of the vertical circle which passes through the body contained between the rational horizon and the body is called. true altitude
632) The summer solstice is the point where the Sun is at __________. maximum declination north
633) In the horizon system of coordinates what is equivalent to latitude on the Earth? Altitude
634) In the horizon system of coordinates what is equivalent to the meridian angle of the celestial equator system? Azimuth angle
635) In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system? Horizon
636) The GHA of a star __________. increases at a rate of approximately 15° per hour
637) The motion of celestial bodies relative to other celestial bodies is known as __________. space motion
638) The parallel of latitude at 23°27'N is the __________. Tropic of Cancer
639) The sidereal day begins when the __________. first point of Aries is over the upper branch of the reference meridian
640) Because the actual center of some planets may differ from the observed center, the navigator applies a correction known as the __________. phase correction
641) If a celestial body is at your meridian, and reaches its highest altitude LHA is__________. 0
642) If the Sun's observed altitude is 28°12', the zenith distance is ___________? 62°48'
643) If the altitude of the body is 45 degrees, what will be its zenith distance 45 degrees
644) It is the distance measured along the arc of hour circle from the elevated pole to the body. Polar distance
645) If a celestial body is rising or setting, that celestial body __________.___ altitude 000 deg
646) If a celestial body is training your local meridian, meridian angles__________. 0
647) An altitude of 90 deg. __________._______ Zenith distance equal to altitude
648) All of the following arcs or angles can be measured in the Horizon system of coordinates EXCEPT meridian angle
649) All of the following arcs or angles can be measured in the Horizon system to coordinates EXCEPT ____. Meridian Angle
650) It is the distance on the hour circle from the elevated pole of the body polar distance
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