Multiple Choice
Sidereal time is the more fundamental time, since it is a measure of the true rotation rate of Earth. Why then do we govern our lives by solar time rather than sidereal time?
A) We cannot divide the day into 24 equal hours of sidereal time.
B) In sidereal time, the Sun would reach the meridian early or late, sometimes by as much as 17 minutes at certain times of the year.
C) Different clocks tick at different rates depending on latitude in sidereal time.
D) We wish to remain in time with the Sun's illumination on Earth, with high Sun angle at about midday every day.
Correct Answer:
Verified
Correct Answer:
Verified
Q66: Precession of Earth's axis of rotation is
Q67: What is the angle, measured in degrees
Q68: At a particular time, the vernal equinox
Q69: If Earth's spin axis were perpendicular to
Q70: The two angles used by astronomers to
Q72: Which ancient culture discovered a 584-day pattern
Q73: At what approximate value of declination was
Q74: What is the declination of Polaris?<br>A)0°<br>B)90°<br>C)a number
Q75: If you were standing on the equator,
Q76: The beginning of a sidereal day (at