Is today the TRUE Equinox?
17 March 2008, 01:53 PM
#1
Is today the TRUE Equinox?
I was always taught that the Spring Equinox occurred on or very close to the 21st of March, and on that day, the length of the day would be equal to the length of the night.
But today, checking sunrise & sunset times for my location, (pretty close to the Greenwich meridian), I see that sunrise was 06:10 and sunset will be 18:10, making it exactly a 12 hour day.
So how come?
Alcazar
But today, checking sunrise & sunset times for my location, (pretty close to the Greenwich meridian), I see that sunrise was 06:10 and sunset will be 18:10, making it exactly a 12 hour day.
So how come?
Alcazar
17 March 2008, 02:16 PM
#4
Scooby Regular
17 March 2008, 04:50 PM
#5
Scooby Regular
Join Date: Jul 2007
Location: Oxfordshire
Posts: 258
Likes: 0
Received 0 Likes
on
0 Posts
OKAY!
18 March 2008, 03:21 PM
#6
Scooby Regular
Join Date: Aug 2002
Posts: 39,877
Likes: 0
Received 0 Likes
on
0 Posts
We Radio Hams who use the twilight in order to make contacts all over the world noticed that too this morning. Yesterday(17th) sunrise and sunset were within a minute of the same time after 0600 and 1800. There is a program called DX Atlas which gives those time each day for where you live as well as pictorially showing the light and dark parts of the world in real time. We also found that the day that the Sun is aligned with the Equator, ie the 20th has a difference between sunrise and sunset of 12 minutes at my house anyway. The only reason I could think of is that that when sunrise arrives and when sunset appears, there maybe some distortion by the atmosphere which may make a difference in the way that the sun's rays reach the Earth.
It was an interesting discussion anyway
Les
It was an interesting discussion anyway
Les
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM