Editing 2903: Earth/Venus Venn Diagram

{{comic
| number    = 2903
| date      = March 6, 2024
| title     = Earth/Venus Venn Diagram
| image     = earth_venus_venn_diagram_2x.png
| imagesize = 416x309px
| noexpand  = true
| titletext = Actually, the fact that Mars is still orbiting safely over here means that it was technically an *Euler* apocalypse, not a Venn one.
}}

==Explanation==
{{incomplete|Created by an interplanetary impact. Do NOT delete this tag too soon.}}

A Venn diagram compares two entities and shows, in the middle area, traits common to both, and in the non-overlapping regions, separate distinct traits. This diagram is simultaneously both a '''{{w|Venn diagram}}''' and a '''proximity illustration'''. 
* As a '''proximity illustration''', it depicts {{w|Earth}} and {{w|Venus}} smashing into each other, resulting in "shockwaves and production of impact ejecta" occuring where they collide. The relative circle sizes are accurate; the circumference of Venus is 5% smaller than Earth's.
* As a '''Venn diagram''', it accurately shows what traits the planets have in common in the event of a collision: "shockwaves and production of impact ejecta."

Shockwaves refer to intense, high-pressure waves that propagate through the materials of both planets at speeds exceeding the sound speed, caused by the immense force of the impact. 

Impact ejecta refers to 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 title text notes that {{w|Mars}} is still orbiting by itself, though presumably out of the frame of the "diagram", since we can't see it. Therefore, this actually makes the overall system an {{w|Euler diagram}} rather than a Venn one, as every circle in any way represented in a Venn diagram must intersect. xkcd has referenced the difference between Euler and Venn diagrams [[2721: Euler Diagrams|before]]. The title text also calls it an "Euler apocalypse" to emphasize that it represents an important event rather than the abstract analysis of properties that either type of diagram normally represents. Going off of this, a "{{w|Big Crunch|Venn apocalypse}}" would consist of every (present) spherical body in the universe colliding simultaneously. This would be dangerous.{{citation needed}}

==Transcript==
:[Two circles are drawn so they overlap. The segments of the circles that overlap are drawn in dashed lines. Each circle has a label and text are written in the central overlapping part the circle. Above the circles there is a caption:]
:Earth/Venus Venn Diagram
:Left: Earth 
:Right: Venus 
:Center: Shock-waves and production of impact ejecta

{{comic discussion}}

[[Category:Venn diagrams]]
[[Category:Astronomy]]
[[Category:Euler diagrams]]
@@ Line 10: / Line 10: @@
 ==Explanation==
-A {{w|Venn diagram}} illustrates the relationships and differences among sets by showing common and distinct elements, using overlapping circles (or other shapes). This comic is both a '''Venn diagram''' and a '''proximity illustration''' of {{w|Earth}} and {{w|Venus}} colliding, physically 'overlapping' each other.
+{{incomplete|Created by an interplanetary impact. Do NOT delete this tag too soon.}}
-* 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 collision moment in which the commonality between Earth and Venus is "shockwaves and production of impact ejecta" at the spot of intermingled Earth-Venus overlap.
-'''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.
+A Venn diagram compares two entities and shows, in the middle area, traits common to both, and in the non-overlapping regions, separate distinct traits. This diagram is simultaneously both a '''{{w|Venn diagram}}''' and a '''proximity illustration'''.
+* As a '''proximity illustration''', it depicts {{w|Earth}} and {{w|Venus}} smashing into each other, resulting in "shockwaves and production of impact ejecta" occuring where they collide. The relative circle sizes are accurate; the circumference of Venus is 5% smaller than Earth's.
+* As a '''Venn diagram''', it accurately shows what traits the planets have in common in the event of a collision: "shockwaves and production of impact ejecta."
-'''Impact ejecta''' are the materials 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.
+Shockwaves refer to intense, high-pressure waves that propagate through the materials of both planets at speeds exceeding the sound speed, caused by the immense force of the impact.
-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."
+Impact ejecta refers to 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.
-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}}
+The title text notes that {{w|Mars}} is still orbiting by itself, though presumably out of the frame of the "diagram", since we can't see it. Therefore, this actually makes the overall system an {{w|Euler diagram}} rather than a Venn one, as every circle in any way represented in a Venn diagram must intersect. xkcd has referenced the difference between Euler and Venn diagrams [[2721: Euler Diagrams|before]]. The title text also calls it an "Euler apocalypse" to emphasize that it represents an important event rather than the abstract analysis of properties that either type of diagram normally represents. Going off of this, a "{{w|Big Crunch|Venn apocalypse}}" would consist of every (present) spherical body in the universe colliding simultaneously. This would be dangerous.{{citation needed}}
-===Similar jokes===
-This joke is similar to the 'Pie chart' meme, showing 'pie I have eaten' and 'pie I have not yet eaten' as a mathematically conventional pie chart formed by a photograph of the actual subject of the chart: a real-world partially-eaten pie.
 ==Transcript==