Monday, June 18, 2007

Credit & Copyright: Vasilij Rumyantsev ( Crimean Astrophysical Obsevatory)

Explanation: If you took a picture of the Sun at the same time each day, would it remain in the same position? The answer is no, and the shape traced out by the Sun over the course of a year is called an analemma. The Sun's apparent shift is caused by the Earth's motion around the Sun when combined with the tilt of the Earth's rotation axis. The Sun will appear at its highest point of the analemma during summer and at its lowest during winter. Analemmas created from different Earth latitudes would appear at least slightly different, as well as analemmas created at a different time each day. The analemma pictured [above] was built up by Sun photographs taken from 1998 August through 1999 August from Ukraine. The foreground picture from the same location was taken during the early evening in 1999 July.

2007 June 17



Anne said...

I wonder how the photos would differ if taken from the equator or Southern Hemisphere?

raymond said...

That's cool! I have never actually thought about what shape the sun would make if you did that. And now I know. Its looks like a bowling pin.

Anonymous said...

That picture is beautiful, and the information is rather interesting too.
It's good to learn something new everyday.

the teach said...

Hey guys (anne, raymond and jm4847) Isn't the picture great?! That's why I chose it and I'm glad to please you who read my blog...

Also I agree it is good to learn something new everyday.