Editing 2903: Earth/Venus Venn Diagram
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==Explanation== | ==Explanation== | ||
| − | A {{w|Venn diagram}} illustrates the relationships and differences among sets by showing common and distinct elements, using overlapping circles | + | A {{w|Venn diagram}} illustrates the relationships and differences among sets by showing common and distinct elements, using overlapping circles. This comic is both a '''Venn diagram''' and a '''proximity illustration''' of {{w|Earth}} and {{w|Venus}} colliding, physically 'overlapping' each other. |
* As a '''proximity illustration''', it depicts Earth and Venus smashing into each other, resulting in "shockwaves and production of impact ejecta" occurring where they collide. The relative circle sizes are accurate; the circumference of Venus is 5% smaller than Earth's. | * As a '''proximity illustration''', it depicts Earth and Venus smashing into each other, resulting in "shockwaves and production of impact ejecta" occurring where they collide. The relative circle sizes are accurate; the circumference of Venus is 5% smaller than Earth's. | ||
| − | * As a '''Venn diagram''', it shows a | + | * As a '''Venn diagram''', it shows that there is a region of one sphere that is still recognizably Earth, a region of the other that is still recognizably Venus, and a region common to both that consists of "shockwaves and production of impact ejecta," and that this area of overlap is now neither Earth nor Venus, but an intermingled combination of the two. |
'''Shockwaves''' are intense, high-pressure waves caused by the immense force of the impact, that propagate through the materials of both planets faster than the speed of sound. | '''Shockwaves''' are intense, high-pressure waves caused by the immense force of the impact, that propagate through the materials of both planets faster than the speed of sound. | ||
| − | '''Impact ejecta''' | + | '''Impact ejecta''' is the material expelled from the impact site, consisting of molten rock, vaporized material, and solid debris, flung out at high velocities due to the energy released by the collision. The production of impact ejecta would indeed occur in the overlapping impact area. |
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| + | This joke is similar to the 'Pie chart' meme, showing 'pie I have eaten' and 'pie I have not yet eaten' as a pie chart formed by a photograph of the actual subject of the chart: a real partially-eaten pie. | ||
The title text is [[2721: Euler Diagrams|another xkcd joke]] about the difference between a [[:Category:Venn diagrams|Venn]] diagram and an [[:Category:Euler diagrams|Euler]] diagram, which is similar to a Venn diagram except that it's acceptable to have circles (or other shapes) that do not intersect if there are no common elements between those sets. The observation that {{w|Mars}} is still orbiting by itself makes Mars an additional set (out of the frame of the diagram), in addition to - but not intersecting with - Earth and Venus, making this technically an {{w|Euler diagram}}. Therefore if the Earth-Venus collision is a "Venn apocalypse," the inclusion of Mars as a non-intersecting entity makes this technically an "Euler apocalypse." | The title text is [[2721: Euler Diagrams|another xkcd joke]] about the difference between a [[:Category:Venn diagrams|Venn]] diagram and an [[:Category:Euler diagrams|Euler]] diagram, which is similar to a Venn diagram except that it's acceptable to have circles (or other shapes) that do not intersect if there are no common elements between those sets. The observation that {{w|Mars}} is still orbiting by itself makes Mars an additional set (out of the frame of the diagram), in addition to - but not intersecting with - Earth and Venus, making this technically an {{w|Euler diagram}}. Therefore if the Earth-Venus collision is a "Venn apocalypse," the inclusion of Mars as a non-intersecting entity makes this technically an "Euler apocalypse." | ||
As a thought experiment, if you expand the diagram infinitely, a "{{w|Big Crunch|Venn apocalypse}}" would consist of every body in the universe being in the process of colliding, simultaneously. This would be very dangerous.{{Citation needed}} | As a thought experiment, if you expand the diagram infinitely, a "{{w|Big Crunch|Venn apocalypse}}" would consist of every body in the universe being in the process of colliding, simultaneously. This would be very dangerous.{{Citation needed}} | ||
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==Transcript== | ==Transcript== | ||
