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Map guide Introduction The Earth Revolutions and rotation Earth is approximately ?? million miles away from the sun Plane of the Elliptic ?? the imaginary at surface on which the earth orbits Earth spins on an axis that is tilted degrees but the tilt is c

Introduction The Earth Revolutions and rotation Earth is approximately ?? million miles away from the sun Plane of the Elliptic ?? the imaginary at surface on which the earth orbits Earth spins on an axis that is tilted degrees but the tilt is constant For the Northern Hemisphere Summer Solstice is June the date where the North Pole is closest to the sun and Winter Solstice is December the date where the south pole is closest to the sun When the earth is closer to the sun the climate is warmer and when it is further away it is colder Solar radiation is made up of the direct EM waves of energy Due to the tilt the day is longer in the north hemisphere in the summer and longer in the winter and this is more prominent as the you go more and more north At degrees north south are the tropics north ?? cancer and south ?? Capricorn Tip remember alphabetical order cancer is before Capricorn At degrees north south are the circles north ?? arctic circle and south ?? Antarctic circle and this area during the solstices are hour sun Modern scienti ?c revolution started with astrophysics Time human observation of regular motion In the middle of the solstices are equal days and nights these are called the equinox ? s autumnal and vernal ?? autumn and spring Time was regularized after the trains were introduced the railroads got together and decided to use GMT and time zones are approx We determined the time through tracking the sun ? s position at the solstices Our ancestors observed the apparent changes in the position of the sun and drew from these observations some astute and for their time remarkably accurate conclusions i e by tracking the position the sun was in the sky high or low they were able to determine the divisions of the year By BCE the Egyptians had calculated the length of the year to be equal to days and a couple of millennia later their successors had sharpened the number to days The natural division of the day between sunlight and darkness was not good enough To measure smaller units of time required arti ?cial inventions that would produce regular brief movements which could be used to count the passage from one time to the next CHourglass and Water Clock were both formed on the idea of a steady ow of a substance and the level left in the vessel allows us to determine the time Escapement is a gear which converts vertical pressure into circular motion Longitude meridians ?? meet at the poles prime meridian is the GMT line Latitude parallels ?? equator is north is x degrees north and south is x degrees south The International Meridian Conference held in Washington DC in selected the line running through the Royal Observatory in Greenwich England as the Prime Meridian or zero degrees longitude which has since gained universal acceptance Time Zones were created on