A.motion of the Earth in its orbit B.rotation of the Earth on its axis C.the body's orbital motion during the time required for its light to reach the Earth D.a false horizon
A.Hercules B.Cygnus C.Aquila D.Capricorn
A.calculating amplitudes B.calculating great circle sailings by the Agiton method C.entering the Air Navigation Tables (Selected Stars) Pub 249 D.plotting on star finders
A.Altitude B.Zenith C.Declination D.Zenith distance
A.Prime vertical circle B.Principal vertical circle C.Parallels of altitude D.Horizon
A.the declination is the opposite name to the latitude B.the algebraic sum of the colatitude and declination exceeds 90 C.the observer is in high latitudes above either polar circle D.the body is circumpolar
A.has a declination equal to twice that of the Sun B.comprises two stars that appear close together C.is twice as bright as a single star D.suddenly becomes much brighter and then fades
A.at elongation angles near 180° B.from quadrature to opposition C.at conjunction D.at opposition
A.on the prime vertical B.a latitude line C.a longitude line D.of no special significance
A.Sirius B.Canopus C.Venus D.Jupiter
