Discussion :: World Geography
- The time interval from when the given star passes directly overhead to when it next passed directly overhead, is defined as
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A.
one sidereal day |
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B.
one solar day |
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C.
both the terms are similar, so any of these may be used |
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D.
None of the above |
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Answer : Option A
Explanation :
A measurement of the sidereal day is made by noting the time at which a particular star passes the celestial meridian (i.e. directly overhead) on two sucessive nights. On Earth, a sidereal day lasts for 23 hours 56 minutes 4.091 seconds, which is slightly shorter than the solar day measured from noon to noon.
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