Lets say for a place that is at a latitude of 55 degrees, how high above the horizon the sun would be on the vernal equinox, summer solstice and winter solstice. Any hints on how to figure this out would be helpful I Know Vernal Equinox-When the sun crosses the Celestial Equator moving from south declination to north declination. All places on Earth have approximately an equal number of daylight and dark hours on this date. Summer Solstice: When the sun reaches its northern-most declination, and is directly over the Tropic of Cancer. It is the day with the longest period of daylight each year in the northern hemisphere. Winter Solstice: When the sun reaches its southern-most declination, and is directly over the Tropic of Capricorn. It is the day with the shortest period of daylight each year in the northern hemisphere.