Welcome to summer!


June 21, 2010 at 7:28 am EDT



The moment of the summer solstice in the Northern Hemisphere is determined by when Earth's North Pole axis is tilted most directly toward the sun. When this is occuring in the Northern Hemisphere, the Earth's South Pole axis is tilted most directly away from the sun, which marks the first day of winter in the Southern Hemisphere.

Watching the Effects of the Summer Solstice

If you have been watching the sun each day leading up to the summer solstice, you will see that it climbs higher in the sky each day. On the day of the solstice, which marks the first official day of summer, the sun appears to stand still. It has reached as far north as it will get. The word "solstice" means the sun stands still. This is also true for the winter solstice, when the sun gets as far south in the sky before coming to a stop.

Is the First Day of Summer the Longest Day of the Year?

The first day of summer is often said to be the longest day of the year. This is because people believe that there is more sunlight on this day than on any other. It is true that the days have been getting longer and the nights shorter. The sun is higher in the sky and takes a longer path across our sky, giving us more daylight. That, combined with the more direct rays of sunshine, give us the warm summer season.

 

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