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Explain xkcd: It's 'cause you're dumb.
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== New here? ==
 
== New here? ==
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<div style="float:right">{{Special:ContributionScores/10/7/nosort,notools}}<div style="font-size:0.85em; width:25em; font-style:italic">Lots of people contribute to make this wiki a success. Many of the recent contributors, listed above, have just joined. You can do it too! Create your account [[Special:UserLogin/signup|here]].</div></div>
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You can read a brief introduction about this wiki at [[explain xkcd]]. Feel free to sign up for an account and contribute to the wiki!  We need explanations for comics, characters, themes, memes and everything in between.  If it is referenced in an [[xkcd]] web comic, it should be here.
 
You can read a brief introduction about this wiki at [[explain xkcd]]. Feel free to sign up for an account and contribute to the wiki!  We need explanations for comics, characters, themes, memes and everything in between.  If it is referenced in an [[xkcd]] web comic, it should be here.
  
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* Discussion about various parts of the wiki is going on at [[Explain XKCD:Community portal]]. Share your 2¢!
 
* Discussion about various parts of the wiki is going on at [[Explain XKCD:Community portal]]. Share your 2¢!
  
* [[List of all comics]] contains a complete table of all xkcd comics so far and the corresponding explanations. The red links ([[like this]]) are missing explanations. Feel free to help out by creating them! [[Help:How to add a new comic explanation|Here's how]].
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* [[List of all comics]] contains a complete table of all xkcd comics so far and the corresponding explanations. The red links ([[like this]]) are missing explanations. Feel free to help out by creating them! '''[[Help:How to add a new comic explanation|Here's how]]'''.
  
 
== Rules ==
 
== Rules ==

Revision as of 21:09, 24 March 2013

Welcome to the explain xkcd wiki!

We have collaboratively explained 6 xkcd comics, and only 2919 (100%) remain. Add yours while there's a chance!

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Go to this comic explanation

Earth Formation Site
It's not far from the sign marking the exact latitude and longitude of the Earth's core.
Title text: It's not far from the sign marking the exact latitude and longitude of the Earth's core.

Explanation

Ambox notice.png This explanation may be incomplete or incorrect: Created by A 4,450,002,024 YEAR OLD BALL OF DUST AND GAS - Please change this comment when editing this page. Do NOT delete this tag too soon.

In this comic, Cueball stands in front of a sign that declares itself to be an historical location. Typically, these signs are placed at precise locations where historical, religious and even mythological events happened (such as where battles have been fought, or where people of note were born, or resided, or accomplished something, or died, or where something supposedly happened). In some cases, multiple locations lay "claim" to events whose true locations are uncertain (or, of course, when events span multiple locations, such as where people resided). However, the event in question on the sign is the formation of the Earth which, due to the Sun's 225-million year long orbit around the center of the Milky Way galaxy and the movement of the galaxy itself through space relative to other objects, would not have occurred anywhere on Earth. The sign could maybe be referring to where the place of the formation of the Earth would be placed if it corresponded to current Earth coordinates, which would also be strange as the Earth formed in the center of the current Earth, so the sign could not be anywhere in the surface of Earth. The sign could also represent the Earth as a whole, indicating that Earth formed on Earth.

The date on the sign is also ridiculously precise, in keeping with the information usually found on historical markers but absurd in the context of the tens or hundreds of millions of years thought to be required for planet formation. It would require some specific definition of when the gradually-coalescing mass could be considered a planet, as well as the ability to determine when that mass met the definition. The date shown for the formation of the Earth, 4.45 billion years, also differs from the commonly accepted date, 4.54 (±0.05) billion years. The difference lies in the transposition of two digits, which might be due to an error in the sign or a mistake on Randall's part.

The title text refers to the 'coordinates of the Earth's core'. This is similar to signs marking specific latitudes, longitudes or other notable locations. But, since all coordinates, when superimposed on a globe, theoretically converge at the Earth's core, this reinforces the idea that no singular location can be picked as the exact location where the Earth formed.

Transcript

Ambox notice.png This transcript is incomplete. Please help editing it! Thanks.
[Cueball is standing in front of a sign in a field of grass. Rocks and plants are scattered across the ground. The sign reads:]
HISTORICAL MARKER
EARTH
FORMATION SITE
--- 4,450,000,000 BCE ---
At this location in the year 4,450,000,000 BCE, a cloud of dust and gas gravitationally collapsed to form the Earth.


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Lots of people contribute to make this wiki a success. Many of the recent contributors, listed above, have just joined. You can do it too! Create your account here.

You can read a brief introduction about this wiki at explain xkcd. Feel free to sign up for an account and contribute to the wiki! We need explanations for comics, characters, themes, memes and everything in between. If it is referenced in an xkcd web comic, it should be here.

  • List of all comics contains a complete table of all xkcd comics so far and the corresponding explanations. The red links (like this) are missing explanations. Feel free to help out by creating them! Here's how.

Rules

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If you want to talk about a specific comic, use its discussion page.

Please only submit material directly related to —and helping everyone better understand— xkcd... and of course only submit material that can legally be posted (and freely edited.) Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.

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