One of the greatest natural effects of Astronomy on the Earth, caused by the revolution of our planet around the Sun combined with the 23.44-degree tilt of the Earth's axis, is the annual multi-color foliage in Autumn. This photograph shows the brilliant Fall foliage in Pennsylvania's Allegheny National Forest. (Image Source: Pittsburgh.about.com )
For more information on Why Leaves Change Color:
Link >>> http://spacewatchtower.blogspot.com/2013/10/colorful-fall-foliage-astronomy-affects.html
Astronomical Calendar for 2013 October:
Link >>> http://buhlplanetarium4.tripod.com/astrocalendar/2013.html#oct
The current month's Astronomical Calendar can also be found on the cover page of the History of The Buhl Planetarium and Institute of Popular Science, Pittsburgh web site at this link:
Link >>> http://buhlplanetarium.tripod.com/#astrocal
Source: Friends of the Zeiss.
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gaw
Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < gawalsh@planetarium.cc >
About the SpaceWatchtower Editor/Author: < http://buhlplanetarium.tripod.com/#GAW >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
< http://buhlplanetarium.tripod.
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
< http://www.planetarium.
* Adler Planetarium, Chicago:
< http://adlerplanetarium.
* Astronomer, Educator, Optician John A. Brashear:
< http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
< http://www.andrewcarnegie.
* Civil War Museum of Andrew Carnegie Free Library:
< http://garespypost.tripod.com >
* Duquesne Incline cable-car railway, Pittsburgh:
< http://inclinedplane.tripod.
* Public Transit:
< http://andrewcarnegie2.tripod.
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