Posted by BC on September 14th, 2009
Autumnal Equinox for 2009 is 22 Sept. at 21:19 UT. What does that mean?
- Equal hours of daytime and nighttime;
- Sun will rise directly east and set directly west (so be careful while you drive);
- an egg will stand on end (which it will do any other day, too);
- and the season changes to autumn.
I will be glad for autumn again. The cooler season generally brings more stable air and shuts down the mosquito population as well as the pollen that fills the air. The season change also means that the stars in the night sky are advancing overhead, and we have different objects to view. The summer sky is full of wondrous objects, and the summer Milky Way is awesome, but the winter sky is just as appealing.
One person has commented
October 7th, 2009 @ 2:51 pm
“Equal hours of daytime and nighttime”
Actually, this will never happen. If the sun were just a pin-point on the horizon, it might. But since the sun has a very large diameter, we have to take into account the radius of the sun that is still setting when crossing over the horizon. Because of this, during the equinox there is more daylight than nighttime. Not by much, but daylight is still longer. Probably by a few minutes at most.