Solar and sidereal time, time zones, equation of time, Julian date and calendar systems.
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Q1 · Time and Calendars · EASY
If the Local Sidereal Time (LST) is 18h 00m and a star has a Right Ascension of 14h 30m, what is its Hour Angle?
Q2 · Time and Calendars · EASY
If the Local Sidereal Time (LST) at a location is 14h 30m, and a star has a Right Ascension of 10h 15m, what is the star's Hour Angle at that instant?
Q3 · Time and Calendars · MEDIUM
A solar day is approximately 4 minutes longer than a sidereal day. This difference arises because: