0
   

Teimareh Petroglyphs and Star Trails; Clicking picture will download the highest resolution version

 
 
Reply Thu 12 Jul, 2012 09:06 am
2012 July 12
See Explanation. Clicking on the picture will download the highest resolution version available.
Teimareh Petroglyphs and Star Trails
Image Credit & Copyright: Babak Tafreshi (TWAN)

Explanation: Engraved in rock, these ancient petroglyphs are abundant in the Teimareh valley, located in the Zagros Mountains of central Iran. They likely tell a tale of hunters and animals found in the middle eastern valley 6,000 years ago or more, etched by artists in a prehistoric age.

In the night sky above are star trails etched by the rotation of planet Earth during the long composite exposure made with a modern digital camera.

On the left, the center of the star trail arcs is the North Celestial Pole (NCP), the extension of Earth's axis into space, with Polaris, the North Star, leaving the bright, short, stubby trail closest to the NCP. But when these petroglyphs were carved, Polaris would have made a long arc through the night.

Since the Earth's rotation axis precesses like a wobbling top, 6,000 years ago the NCP was near the border of the constellations Draco and Ursa Major, some 30 degrees from its current location in planet Earth's sky.

PHOTOS

http://apod.nasa.gov/apod/
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Discussion • Score: 0 • Views: 1,655 • Replies: 1
No top replies

 
Region Philbis
 
  1  
Reply Thu 12 Jul, 2012 10:02 am
@BumbleBeeBoogie,

http://apod.nasa.gov/apod/image/1207/Teimareh-Tale-Tafreshi.jpg
0 Replies
 
 

Related Topics

Saturn as seen by Cassini - Discussion by littlek
New Comet May Be Observers' Dream Come True - Discussion by Zarathustra
Are you ready for the solar eclipse Sunday? - Question by Lustig Andrei
Red dwarf stars and their planets - Discussion by gungasnake
Geology and astronomy combined - Question by Lapetus
Total Solar eclipse of August 21, 2017 - Discussion by rosborne979
physics - Discussion by usmankhalid665
A Series of Humbling Pictures - Discussion by edgarblythe
The Early Universe - Question by piratejack5150
Universal Census of the Universe - Discussion by tsarstepan
More new planets in from ESO - Discussion by littlek
 
  1. Forums
  2. » Teimareh Petroglyphs and Star Trails; Clicking picture will download the highest resolution version
Copyright © 2024 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.03 seconds on 05/30/2024 at 06:35:12