WorksheetsCoordinate systems
Total questions: 13
Worksheet time: 7mins
What is the Celestial Sphere?
An imaginary sphere surrounding the Earth on which all celestial objects are placed
The path which the Sun takes through the celestial sphere in one year
The line that runs from due north on the horizon to due south
The bearing of an object taken from true north moving in an easterly direction
What is the Ecliptic?
The path which the Sun takes through the celestial sphere in one year
An imaginary sphere surrounding the Earth on which all celestial objects are placed
The line that runs from due north on the horizon to due south
The bearing of an object taken from true north moving in an easterly direction
What is Hour Angle?
The angle of the object measured upwards from the observable horizon
The path which the Sun takes through the celestial sphere in one year
The bearing of an object taken from true north moving in an easterly direction
The time since a star last culminated on the meridian
What is Declination?
The angle of the object measured upwards from the observable horizon
The angle of the object measured upwards from the celestial equator
The bearing of an object taken from true north moving in an easterly direction
The time since a star last culminated on the meridian
What is Altitude?
The angle of the object measured upwards from the observable horizon
The path which the Sun takes through the celestial sphere in one year
The bearing of an object taken from true north moving in an easterly direction
The time since a star last culminated on the meridian
What is Azimuth?
The angle of the object measured upwards from the observable horizon
The path which the Sun takes through the celestial sphere in one year
The bearing of an object taken from true north moving in an easterly direction
The time since a star last culminated on the meridian
What is the Meridian?
The angle of the object measured upwards from the observable horizon
The path which the Sun takes through the celestial sphere in one year
The line that runs from due north to due south and passes through the observer's zenith
The bearing of an object taken from true north moving in an easterly direction
What is the North Celestial Pole?
The most northerly point that the Sun passes through on the celestial sphere
The line that runs from due north on the horizon to due south
The first point of Ares
The projection into space of the Earth's geographical North Pole
What is Diurnal Motion?
The apparent motion of an object due to the daily rotation of the Earth
The path which the Sun takes through the celestial sphere in one year
The line that runs from due north on the horizon to due south
The bearing of an object taken from true north moving in an easterly direction
A star is circumpolar if....
The star's declination is greater than 90° minus the observer's latitude
The star's declination is less than 90° minus the observer's latitude
The star's altitude is greater than 90° minus the observer's latitude
The star's altitude is less than 90° minus the observer's latitude
What is the altitude of a star at upper/lower transit?
The observer's latitude plus the star's co-declination
The observer's latitude minus the star's co-declination
The observer's latitude plus 90° minus the star's declination
The observer's latitude minus 90° minus the star's declination
What is Local Sidereal Time (LST)?
The time since a star last culminated on the meridian
The time elapsed since the last culmination of the Vernal Equinox
The time since the observer's latitude was last crossed by a star
The time since the observer's longitude was last crossed by a star
What is Hour Angle (HA) of a star?
The time since a star last culminated on the meridian
The time elapsed since the last culmination of the Vernal Equinox
The time since the observer's latitude was last crossed by a star
The time since the observer's longitude was last crossed by a star
