Podcast Beta
Questions and Answers
Match the following time measurements with their definitions:
Terrestrial Time (TT) = Based on mean solar time in Moscow Sidereal Time = Based on positions of stars relative to the meridian Solar Time = Defined according to the Sun's position relative to the meridian Hour Angle (HA) = Time since an object last crossed the meridian
Match the following statements about hour angles with their correct interpretation:
Hour Angle of 0h = A star is crossing the meridian now Hour Angle of 3h = A star crossed the meridian 3 hours ago Hour Angle of -1h = A star will cross the meridian 1 hour from now Hour Angle of 23h = Equivalent to a star crossing the meridian 1 hour from now
Match the following terms with their meanings in celestial navigation:
Local Sidereal Time (LST) = Hour angle of the March equinox Right Ascension = Relationship with current hour angle and LST for an object Tropical Year = Approximately 365.25 days in length Leap Years = When and why they occur
