Re:A positive leap second will be introduced at the end of J...
by nullc on Tuesday January 06, 2015 @01:56AM
(#8843216)
Astronomy usually needs sidereal time.
Mean solar time is a largely mathematical construct that has no direct relation to anything immediately observable. (Notice the word 'mean' ... to _observe_ mean solar time you'd need to watch the sun for a whole year from the equator.)
To the extent that astronomy applications want solar time at all, they probably wants it with more precision than you get from UTC.
Mean solar time is a largely mathematical construct that has no direct relation to anything immediately observable. (Notice the word 'mean' ... to _observe_ mean solar time you'd need to watch the sun for a whole year from the equator.)
To the extent that astronomy applications want solar time at all, they probably wants it with more precision than you get from UTC.