Talk:Cosmic Calendar

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WikiProject Time assessment rating comment[edit]

Might not need to be much more than a stub.

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Yamara 02:15, 16 February 2008 (UTC)

Inconsistent[edit]

The diagram and the given dates are inconsistent (e.g., multi-cellular life). Here are my calculations:

 UNIVERSE
 --------------------------------------------------------------------------
 Age = 13.75 billion years
 COSMIC CALENDAR RATIOS (CCR)
 --------------------------------------------------------------------------
 Years per Day    = 37671232.9
 Years per Hour   = 1569634.7
 Years per Minute = 26160.5784
 Years per Second = 436.00964
 COSMIC CALENDAR CALCULATIONS
 --------------------------------------------------------------------------
 CCR Day    = 365 - (365 * t) / Universe Age
 CCR Hour   = 24 - (8760 * t) / Universe Age
 CCR Minute = 60 - (t / 26160.5784) 
 CCR Second = 60 - (t / 436.00964)
 MILKY WAY
 --------------------------------------------------------------------------
 Age = 10 billion years
 CCR = 100 day, APR 10
 SOLAR SYSTEM
 --------------------------------------------------------------------------
 Age Sun   = 4.57 billion years
 Age Earth = 4.54 billion years
 CCR       = 244 day, SEP 1
 LIFE
 --------------------------------------------------------------------------
 Age = 3.4 billion years
 CCR = 275 day, OCT 2
 EUKARYOTES
 --------------------------------------------------------------------------
 Age = 2.2 billion years
 CCR = 307 day, NOV 3
 SPONGES
 --------------------------------------------------------------------------
 Age = 665 million years
 CCR = 347 day, DEC 13
 FLATWORMS
 --------------------------------------------------------------------------
 Age = 550 million years
 CCR = 350 day, DEC 16
 http://en.wikipedia.org/wiki/File:FlatwormZICA.png
 FISH
 --------------------------------------------------------------------------
 Age = 510 million years
 CCR = 351 day, DEC 17
 PLANTS
 --------------------------------------------------------------------------
 Age = 425 million years
 CCR = 354 day, DEC 20
 TETRAPODS
 --------------------------------------------------------------------------
 Age = 375 million years
 CCR = 355 day, DEC 21
 REPTILES
 --------------------------------------------------------------------------
 Age = 320 million years
 CCR = 357 day, DEC 22
 DINOSAURS
 --------------------------------------------------------------------------
 Age = 230 million years
 CCR = 359 day, DEC 25
 MAMMALS
 --------------------------------------------------------------------------
 Age = 210 million years
 CCR = 359 day, DEC 25
 BIRDS
 --------------------------------------------------------------------------
 Age = 150 million years
 CCR = 361 day, DEC 27
 EXTINCTION EVENT
 --------------------------------------------------------------------------
 Age = 65.5 million years
 CCR = 363 day, DEC 29
 PRIMATES
 --------------------------------------------------------------------------
 Age = 60 million years
 CCR = 363 day, DEC 29
 ==== DEC 31 ==============================================================
 APES
 --------------------------------------------------------------------------
 Age = 29 million years
 CCR = 05:00
 GREAT APES
 --------------------------------------------------------------------------
 Age = 14 million years
 CCR = 15:00
 EARLY HUMANS
 --------------------------------------------------------------------------
 Age = 2.35 million years
 CCR = 22:00
 STONE TOOLS
 --------------------------------------------------------------------------
 Age = 1.76 million years
 CCR = 22:00
 ==== DEC 31, 23:00 =======================================================
 SPEAR
 --------------------------------------------------------------------------
 Age = 500000 years
 CCR = 23:41
 FIRE
 --------------------------------------------------------------------------
 Age = 400000 years
 CCR = 23:45
 MODERN HUMANS
 --------------------------------------------------------------------------
 Age = 195000 years
 CCR = 23:53
 SPEECH
 --------------------------------------------------------------------------
 Age = 150000 years
 CCR = 23:54
 FLUTE
 --------------------------------------------------------------------------
 Age = 35000 years
 CCR = 23:58
 Link - http://news.bbc.co.uk/2/hi/science/nature/8117915.stm
 ==== DEC 31, 23:59 =======================================================
 FIGURINE
 --------------------------------------------------------------------------
 Age = 26000 years
 CCR = 23:59:00 
 BOW & ARROW
 --------------------------------------------------------------------------
 Age = 25000 years
 CCR = 23:59:03
 BOOMERANG
 --------------------------------------------------------------------------
 Age = 23000 years
 CCR = 23:59:07 
 NEEDLE
 --------------------------------------------------------------------------
 Age = 21000 years
 CCR = 23:59:12
 POTTERY
 --------------------------------------------------------------------------
 Age = 16000 years
 CCR = 23:59:23
 JERICHO
 --------------------------------------------------------------------------
 Age = 11000 years
 CCR = 23:59:35
 AGRICULTURE
 --------------------------------------------------------------------------
 Age = 10000 years
 CCR = 23:59:37
 SMELTING
 --------------------------------------------------------------------------
 Age = 8000 BCE
 CCR = 23:59:42
 WRITING
 --------------------------------------------------------------------------
 Age = 5500 BCE
 CCR = 23:59:47
 Link - http://news.bbc.co.uk/2/hi/science/nature/334517.stm
 WHEEL
 --------------------------------------------------------------------------
 Age = 3500 BCE
 CCR = 23:59:52
 PYRAMIDS
 --------------------------------------------------------------------------
 Age = 2630 BCE
 CCR = 23:59:55
 SCIENCE
 --------------------------------------------------------------------------
 Age = 1600 BCE
 CCR = 23:59:56
 PRINTING
 --------------------------------------------------------------------------
 Age = 1440 CE; 572 years ago
 CCR = 23:59:59

Thangalin (talk) 01:00, 26 January 2012 (UTC)


Much thanks for checking up on this, sorry for the delay; I wasn't monitoring the talk page. The graphic dates had been pulled from a variety of sources. I revisited points of conflict in dates:

  • The galaxy date is based on formation of the disk we live in (8.8 bya). I'm not sure where you get 10 bya. Clarified the text to say "disk".
  • The solar system starts either at the very end of August or beginning of september, but I bumped it forward to september as you suggest since I think the graphic implied that it "fills" the month. This unfortunately requires stomping on the first life graphic.
  • Oldest fossils are 3.5 bya, but chemicals from life have been found going back 3.8 bya, so either way no change on first life in september.
  • I bumped eukaryotes from october since that's debatable and inserted photosynthesis instead, using a stromatolite for illustration. I kept multicellular life and sex in november, as this is the key outcome for eukaryotes, and the word eukaryote is technical and potentially off putting.
  • Added sponges and fish.
  • Moved reptiles 1 day earlier and eliminated amphibians due to ambiguity in fossil record

--Efbrazil (talk) 18:53, 16 February 2012 (UTC)

Purpose?[edit]

I'm a little unsure as to the purpose of this idea. Is it simply to help humans conceptualize the vast spans of time in Cosmology?

Something to this effect should be added to the article by somebody who actually knows anything about this. Lesmothian (talk) 19:37, 6 November 2009 (UTC)

Who invented this scale?[edit]

It would be interesting to give this information in the article. Was Sagan the inventor or just the main "popularizer"? —Preceding unsigned comment added by 87.219.165.19 (talk) 09:28, 10 November 2010 (UTC)