Everybody knows, there are us to envisage the longitude and latitude that give on the earth, still have a few longitude and latitude more special, change day of line, tropic for example, still have equator.
But you have had thought, why should be equator used " bare " represent gules word this?
Think named matter is equatorial all the time in one's childhood very hot, but not be actually such.
The reason that equator names is very simple, it is it be red really.
We have two equator actually, one is the equator of clingy earth surface, another is the equator of celestial culmination ball.
And archaic China use armillary sphere comes graph of star of observation, scale, on star graph, state with red line celestial sphere is equatorial namely.
And Japan also gets such influence, describe same thing as much with Chinese character equator. Again additional finally little knowledge, there also are ecliptic and moon's path in astronomy, former it is the contrail that the sun runs, latter is the contrail that the moon runs. That, can Hesperian also feel equator is colored? Should do not have this to return a responsibility. The equator in English is " Equator " , it is the meaning of a thing divide into equal parts, although be very reasonable,name, more intuitionistic nevertheless, without the composition of what romance.
