Chankillo or Chanquillo at Casma Peru Ancient Peruvian Astronomical Observatory; a 2,300 years old ingenious solar instrument built by a pre-Inca civilization to calculate time and draft calendars. After resent research by the Peruvian Archaeologist Ivan Ghezzi and other highly credited international institutions, has been explained that up to the moment it is the oldest complete solar observatory that is found in America.
Dr. Ghezzi mentions a point of observation (see drawing below) whose distance permits to see the sun appears slightly outside the columns formation during the solstices. Columns 1 and 13 demark the time of the solstices in June or December with the appearance or the sun setting depending of an equidistant East or West point of observation; column 7 at the middle is expected to point also where the two Equinoxes take place.
Dr. Ghezzi mentions a point of observation (see drawing below) whose distance permits to see the sun appears slightly outside the columns formation during the solstices. Columns 1 and 13 demark the time of the solstices in June or December with the appearance or the sun setting depending of an equidistant East or West point of observation; column 7 at the middle is expected to point also where the two Equinoxes take place.
This drawing explains how Earth
tilting angle is used to observe the sun
position changes at sunrise and sunset in
(inverted position) during the whole year.
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