Wednesday, June 20, 2007

Thursday! Longest Day!!!

The Sun in the sky during the Summer in the Northern hemisphere

On the Summer Solstice, which occurs on June 21, the Sun is at its highest path through the sky and the day is the longest. Because the day is so long the Sun does not rise exactly in the east, but rises to the north of east and sets to the north of west allowing it to be in the sky for a longer period of time.

After the summer solstice the Sun follows a lower and lower path through the sky each day until it reaches the point where it is in the sky for exactly 12 hours again. This is the Fall Equinox. Just like the Spring Equinox, the Sun will rise exactly east and set exactly west on this day and everyone in the world will experience a 12 hour day.

After the Fall Equinox the Sun will continue to follow a lower and lower path through the sky and the days will grow shorter and shorter until it reaches its lowest path and then we are back at the Winter Solstice where we started.

1 comment:

Trish said...

This was SO interesting to read! I love stuff like that. I knew it was the longest day (with my Wed a few weeks ago in a close 2nd) but I never really understood why. Now I do! Thanks!