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Natural Environment How Human History has been impacted by the environment, science, nature, geography, weather, and natural phenomena


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Old January 27th, 2012, 08:02 AM   #1

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The Astronomy Thread


Ancient Astronomers Were No Fools

Ancient Astronomers Were No Fools - News from Sky & Telescope - SkyandTelescope.com

Quote:
Thereís no doubt ancient astronomers were clever folk. Realizing Earth was round, estimating the Sunís distance, discovering heliocentricity ó itís quite a list. But Brad Schaefer (Louisiana State University) suggested at the recent American Astronomical Society meeting in Austin that we should add another light bulb to the glow shining from history: ancient astronomers may have corrected for dimming caused by the atmosphere, centuries before anyone came up with a physical model for it.
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Old January 27th, 2012, 08:15 AM   #3

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Quote:
The Megalithic Passage Tombs of Newgrange, Knowth, Dowth, Fourknocks, Loughcrew and Tara are located in the present day County of Meath on the east coast of Ireland
Newgrange, Knowth, Dowth, Tara - Boyne Valley, Ireland
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Old January 27th, 2012, 08:24 AM   #4

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About Newgrange:

The Light-box/Roof-box - Above the entrance passage is a 'light-box', which precisely aligns with the rising sun at the winter solstice of 21st December, so that the rays touch the ground at the very centre of the tomb for about 20 minutes. Many of the upright stones along the walls of the 19m (62ft) passage, which follows the rise of the hill, are richly decorated.

Click the image to open in full size.

The light-box combines with other design features so that the light is narrowed with the result that a small 'dagger' of light slides along the floor of the passage towards the inner chamber, where it illuminates it for 17 minutes a year.

http://www.ancient-wisdom.co.uk/irelandnewgrange.htm
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Old January 27th, 2012, 08:25 AM   #5

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The Mythology of the Constellations


The Mythology of the Constellations
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Old January 27th, 2012, 08:27 AM   #6
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hello all, it is 09:26hrs here in Incline Village.

They even knew of the Precession of The Equinoxes. http://en.wikipedia.org/wiki/Axial_p...on_(astronomy)

It was discovered by Hipparchus around 162 to 127 BC.
Hipparchus Hipparchus



This eventually led to the correct determination of the Polar Stars and Ursa Major, The length of the year, The Spring Equinox telling them when to plant; and to fixing the zodiac.


Click the image to open in full size.

Last edited by laketahoejwb; January 27th, 2012 at 08:41 AM.
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Old January 27th, 2012, 08:30 AM   #7

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Island of the Setting Sun: In Search of Ireland's Ancient Astronomers


Amazon.com: Island of the Setting Sun: In Search of Ireland's Ancient Astronomers (9781905785476): Anthony Murphy, Richard Moore: Books
Amazon.com: Island of the Setting Sun: In Search of Ireland's Ancient Astronomers (9781905785476): Anthony Murphy, Richard Moore: Books

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Old January 27th, 2012, 08:31 AM   #8

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beautiful pic --- WOW
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Old January 27th, 2012, 08:33 AM   #9

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just a FYI -- this will give me LOTS of reading for the next 12 months --


Astronomy Society: Ancient Roman Astronomy
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Old January 27th, 2012, 08:35 AM   #10

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and for the "greeks" in the crowd

http://www.physics.ubc.ca/~berciu/PH...-Astronomy.pdf
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