[headsonpikes]

Chances are that an Ice Age will get us before a meteorite or comet.

Of course, glaciers are easier to outrun.

[FreedomCalls]

[aruanan]

Good one, blam.

[aruanan]

The idea of the inner Solar System being different now to from what it was 50,000 years ago has not been widely accepted.

"Ever since our fathers died, everything goes on as it has since the beginning of creation."

Well, it seems that not too much has changed over the past 1960 years or so.

[blam]

(Prince) Madoc In America

[mhking]

Aaaahhh....it was just the time-displaced Federation and Borg fighting for control of the planet...

[SevenDaysInMay]

Thanks for the post.

[dr_who_2]

These facts are supported by archaeological evidence from Dark-Age era burial sites suggesting that the average Dark Age man suffered from a disproportionate number of stubbed toes and bruised shins, not to mention myopia. Concern about the latter affliction made the act of reading books a luxury to all but those who could afford lots and lots of candles.

[SC Swamp Fox]

bump...for later reading.

[MattAMiller]

Bump for later reading

[LonePalm]

Bump for later read!

Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)

[Dajjal]

BTTT

[TheLion]

Bump

[SunkenCiv]

Just adding this to the GGG homepage, not sending a general distribution.

Please FREEPMAIL me if you want on or off the "Gods, Graves, Glyphs" PING list --
Archaeology/Anthropology/Ancient Cultures/Artifacts/Antiquities, etc.

[SunkenCiv]

historical ephemeris of comet halley

Google

[SunkenCiv]

The History of Comet Halley
by Donald K. Yeomans,
Jurgen Rahe, and
Ruth S. Freitag
October 17 1985
Royal Astronomy Society of Canada
NASA Astrophysics Data System

In an attempt to account for this 4-day discrepancy between the actual period of Comet Halley and that computed from perturbations by the known planets, some unorthodox solutions have been proposed. Brady (1972) suggested the influence of a massive trans-Plutonian planet, and Rasmusen (1967) adjusted the sun:Jupiter mass ratio from the accepted value of 1047 to 1051. Both of these proposed solutions must be rejected because they would produce efects on the motion of the known planets that are not supported by observation. Rasmusen (1981) derived a 1986 perihelion date of February 5.46 from a fit to the observations in 1835 and 1910 and then added +3.96 days to yield a 1986 perihelion passage time prediction of February 9.42. Brady and Carpenter (1967) first suggested a 1986 perihelion passage time of February 5.37 based upon a "trial and error" fit to the observations during the 1835 and 1910 returns. Brady and Carpenter (1971) then introduced an empirical secular term in the radial component of the comet's equations of motion... By stepping backward in time at roughly 76-77 year intervals and analyzing European and Chinese observations, Hind (1850) attempted to identify Comet Halley apparitions from 11 B.C. to 1301... Although many of Hind's identifications were correct, he was seriously in error for his suggested perihelion passage times in A.D., 1223, 912, 837, 608, 373, and 11 B.C... It is fortunate that this apparition, during which Comet Halley made its closest approach to the earth, is covered by the most detailed set of observations preserved in Far-Eastern records. On the night of March 22, a broom star appeared in the east with a 11 deg tail pointing west. On the night of April 6, the 15 deg tail pointed slightly south while on the evening of April 11, the 76 deg tail pointed north. Two nights later the tail reached its maximum length of 93 deg and pointed east. Thus, in a few weeks' time, the Chinese reported the tail pointing in all four directions.

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[SunkenCiv]

This one is another golden oldie, please keep that in mind when replying. :')

Just updating the GGG information, not sending a general distribution.

To all -- please ping me to other topics which are appropriate for the GGG list. Thanks.

Please FREEPMAIL me if you want on or off the
"Gods, Graves, Glyphs" PING list or GGG weekly digest
-- Archaeology/Anthropology/Ancient Cultures/Artifacts/Antiquities, etc.
Gods, Graves, Glyphs (alpha order)

[SunkenCiv]

:')

The Dark Ages: Were They Darker Than We Imagined?
Universe | Sept 99 | Greg Bryant
Posted on 09/24/2002 2:18:33 PM EDT by blam
http://www.freerepublic.com/focus/chat/756422/posts

[SunkenCiv]

Astronomy & Geophysics
Volume 45 Issue 1 Page 1.23 - February 2004
doi:10.1046/j.1468-4004.2003.45123.x
Volume 45 Issue 1

Comet impact
A comet impact in AD 536?
Emma Rigby1, Melissa Symonds2 and Derek Ward-Thompson2

Emma Rigby, Melissa Symonds and Derek Ward-Thompson review the evidence for the possibility that a comet may have impacted the Earth in historical times, and discuss the size of the putative comet.

Abstract

A global climatic downturn has previously been observed in tree-ring data associated with the years AD 536–545. We review the evidence for the explanation of this event which involves a comet fragment impacting the Earth and exploding in the upper atmosphere. The explosion would create a plume, such as was seen during the impact of comet Shoemaker-Levy 9 with Jupiter. The resulting debris deposited by the plume on to the top of the atmosphere would increase the opacity and lower the temperature. We calculate the size of the comet required, and find that a relatively small fragment of only about half a kilometre in diameter could be consistent with the data. We conclude that plume formation is a by-product of small comet impacts that must be added to the list of significant global hazards posed by near-Earth objects.

Article published online 28 Jan 2004

Affiliations

1Cardiff University, UK (now at Edinburgh University, UK)2Cardiff University

The authors thank Mike Baillie, Mark Bailey, Martin Johnson, Ted Johnson-South and David Williams for interesting and helpful discussions.

To cite this article
Rigby, Emma, Symonds, Melissa & Ward-Thompson, Derek (2004)
A comet impact in AD 536?.
Astronomy & Geophysics 45 (1), 1.23-1.26.
doi: 10.1046/
j.1468-4004.2003.45123.x

Blackwell Synergy® is a Blackwell Publishing, Inc. registered trademark

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[668 - Neighbor of the Beast]

More here on the same subject...

http://www.pbs.org/wnet/secrets/flash/catastrophe1_script.html