Show 1 i v J A About h. h out S. S Spring The vernal equinox which heralds the beginning of Spring occurs March 21 this year At that moment the earths earth's axis is at a rightangle rightangle right rightangle angle to the direction of the sun At the vernal equinox day and night are equal allover all allover allover over the world THE OTHER time during the year when this occurs is in September at the autumnal autumnal autumnal autum autum- nal equinox which will occur on September 23 in 1970 In addition to the equinoxes there is a summer and winter sol sol- sol sol- stice The summer solstice begins in June when the North Pole is tilted 23 degrees and 27 minutes toward the sun and therefore in the northern hemisphere hemisphere hemisphere hemi hemi- sphere the days are longer than the nights At the same time the days in the southern hemisphere where the South Pole is pointed away from the sun are shorter than the nights BECAUSE OF the tilted axis of the earth when the northern northern northern north north- ern hemisphere is tilted to toward toward toward to- to ward the sun experiencing long days and warm weather the southern hemisphere is tilted away experiencing short days and colder weather Therefore the beginning of Spring in the southern hemisphere hemisphere hemis hemis- hemisphere phere is September 23 the summer solstice is December 21 etc |