2908: Moon Armor Index - Revision history

Amateurautist: revised the transcript to describe each moon armor bar's height

2025-12-17T16:25:46Z

revised the transcript to describe each moon armor bar's height

CalibansCreations: /* Explanation */

2025-01-30T14:51:24Z

‎Explanation

B for brain: /* Explanation */

2024-03-25T09:30:53Z

‎Explanation

Asdf: /* Explanation */

2024-03-24T21:02:37Z

‎Explanation

Asdf: /* Explanation */ space, mt everests

2024-03-24T09:09:51Z

‎Explanation: space, mt everests

172.71.98.146: Completed the table

2024-03-23T16:27:11Z

Completed the table

172.71.98.147: Added data to table

2024-03-23T16:16:04Z

Added data to table

172.70.247.33: Corrected data in table

2024-03-23T14:49:23Z

Corrected data in table

172.70.47.81: Added data to table

2024-03-23T14:30:31Z

Added data to table

172.68.144.147: /* The complexities of armor thickness calculations */ add note about what happens if the moon material sinks into a gaseous planet

2024-03-22T23:35:57Z

‎The complexities of armor thickness calculations: add note about what happens if the moon material sinks into a gaseous planet

@@ Line 77: / Line 77: @@
 :[Above the diagram, there is a depiction of two moons orbiting a planet, an arrow pointing right, and the same planet with an additional layer around it without orbiting moons.]
-:[The diagram consists of vertical bars showing "moon armor" thicknesses for the Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Salacia, Haumea, Quaoar, Gonggong and Eris. Earth's bar has a label named "43 km thick" and is compared to the height of a comparatively small Mt Everest, with randomly drawn features indicating a cross section of the additional layer's rocky material. Most of the other armor thickness bars are not very tall compared to Earth. Some bars, notably Jupiter's, are embellished with various strata-like lines that possibly correspond to different contributing moons. Most bars show some small dots and patterns. A circular viewport shows the zoomed in detail of the top of Mars's otherwise not visible bar that reveals a thin layer with the label of 2", and also the bottom of a Mars rover wheel on top of the new surface. Pluto's bar is slightly taller than Earth's and has a label "(Mostly Charon)" inside, with arrows pointing into the bar area, which looks similar to that of Earth's Moon.]
+:[The diagram consists of vertical bars showing "moon armor" thicknesses for (from left to right) Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Salacia, Haumea, Quaoar, Gonggong and Eris. Each bar is a different height, and they are listed as follows from shortest to tallest:]
+:[Mars' armor is not visible, though there is a diagram representing a zoomed-in portion of its armor, which is 2 inches (5 cm) thick, accompanied by a partial view of the wheel of a Mars Rover for scale.]
 {{comic discussion}}

@@ Line 24: / Line 24: @@
 * although the coating would provide some protection to the underlying surface on which it was placed, it would effectively become part of the planet, and raise the surface. The things we would normally care about protecting, such as any life forms that exist, would be forced to relocate to this new surface, and therefore not benefit from any protection, while suffering significant detrimental impact to habitats, etc.
-The title text continues that NASA's [https://what-if.xkcd.com/117/ Planetary Protection Officer] is purportedly in favor of the idea. In reality, this officer is actually responsible for keeping other celestial bodies safe from Earth's contamination, not for shielding planets in armor. Theoretically, though, armoring other planets could indeed protect them from further Earth-sourced contamination, and armoring Earth would also theoretically protect other planets by burying the biosphere and all of Earth life not already sent into space — a potentially civilization-smothering action, though a surprisingly unapocalyptic result compared to many of Randall’s “What If?” scenarios.
+The title text continues that NASA's {{what if|117|Planetary Protection Officer}} is purportedly in favor of the idea. In reality, this officer is actually responsible for keeping other celestial bodies safe from Earth's contamination, not for shielding planets in armor. Theoretically, though, armoring other planets could indeed protect them from further Earth-sourced contamination, and armoring Earth would also theoretically protect other planets by burying the biosphere and all of Earth life not already sent into space — a potentially civilization-smothering action, though a surprisingly unapocalyptic result compared to many of Randall’s “What If?” scenarios.
 {| class="wikitable"

← Older revision		Revision as of 09:30, 25 March 2024
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	==Explanation==		==Explanation==
−	~~{{incomplete\|Created by a MARS ROVER THAT GREW 2 INCHES OVERNIGHT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}~~
−
	In this “What If?”-style comic, [[Randall]] hypothesizes an imaginative situation in which each planet's moon(s) become converted into protective armor (as a form of {{w\|Overburden#Analogous uses\|overburden}}) to coat the respective planet. For example, the {{w\|Moon}} would coat {{w\|Earth}} in a 43 kilometer layer if it were molded into protective armor, almost five times the height of {{w\|Mount Everest}}.		In this “What If?”-style comic, [[Randall]] hypothesizes an imaginative situation in which each planet's moon(s) become converted into protective armor (as a form of {{w\|Overburden#Analogous uses\|overburden}}) to coat the respective planet. For example, the {{w\|Moon}} would coat {{w\|Earth}} in a 43 kilometer layer if it were molded into protective armor, almost five times the height of {{w\|Mount Everest}}.

@@ Line 32: / Line 32: @@
 ! Planet/<br>dwarf planet !! Surface area (km²) || Moons || Total volume (km³) || Moon shield thickness
 |-
-| {{w|Earth}} || 5.1007*10^8 || {{w|Moon|1}} || 2.196*10^10 || 43&nbsp;km (27&nbsp;mi) [4.86 {{w|Mount Everest}}s]
+| {{w|Earth}} || 5.1007×10^8 || {{w|Moon|1}} || 2.196×10^10 || 43&nbsp;km (27&nbsp;mi) (4.86 × height of {{w|Mount Everest}})
 |-
-| {{w|Mars}} || 1.4437*10^8 || {{w|Moons of Mars|2}} || {{w|Phobos (moon)|(5695±32)}}+{{w|Deimos (moon)|(1033±19)}} || 5&nbsp;cm (2&nbsp;in)
+| {{w|Mars}} || 1.4437×10^8 || {{w|Moons of Mars|2}} || {{w|Phobos (moon)|(5695±32)}}+{{w|Deimos (moon)|(1033±19)}} || 5&nbsp;cm (2&nbsp;in)
 |-
-| {{w|Jupiter}} || 6.1469*10^10 || {{w|Moons of Jupiter|95}} || 1.7646*10^11 || 2.87&nbsp;km (1.78&nbsp;mi)
+| {{w|Jupiter}} || 6.1469×10^10 || {{w|Moons of Jupiter|95}} || 1.7646×10^11 || 2.87&nbsp;km (1.78&nbsp;mi)
 |-
-| {{w|Saturn}} || 4.27*10^10 || {{w|Moons of Saturn|146}} || 7.651*10^10 || 1.79&nbsp;km (1.11&nbsp;mi)
+| {{w|Saturn}} || 4.27×10^10 || {{w|Moons of Saturn|146}} || 7.651×10^10 || 1.79&nbsp;km (1.11&nbsp;mi)
 |-
-| {{w|Uranus}} || 8.1156*10^9 || {{w|Moons of Uranus|28}} || 5.61*10^9 || 0.69 km (0.43 mi)
+| {{w|Uranus}} || 8.1156×10^9 || {{w|Moons of Uranus|28}} || 5.61×10^9 || 0.69 km (0.43 mi)
 |-
-| {{w|Neptune}} || 7.6187*10^9 || {{w|Moons of Neptune|16}} || 1.04*10^10 || 1.36 km (0.84 mi)
+| {{w|Neptune}} || 7.6187×10^9 || {{w|Moons of Neptune|16}} || 1.04×10^10 || 1.36 km (0.84 mi)
 |-
-| {{w|Pluto}} || 1.7744*10^7 || {{w|Moons of Pluto|5}} || {{w|Charon (moon)|(9.322×10^8)}}+{{w|Moons of Pluto|(approx 87100+38800+900+200)}} || 52.5&nbsp;km (32.6&nbsp;mi) (by this comic's approximation)
+| {{w|Pluto}} || 1.7744×10^7 || {{w|Moons of Pluto|5}} || {{w|Charon (moon)|(9.322×10^8)}}+{{w|Moons of Pluto|(approx 87100+38800+900+200)}} || 52.5&nbsp;km (32.6&nbsp;mi) (by this comic's approximation)
 .4&nbsp;km (31.3&nbsp;mi) (by full calculation)
 |-
-| {{w|120347 Salacia|Salacia}} || 2.27*10^6 || {{w|Actaea (moon)|1}} || 1.41*10^7 || 6.21&nbsp;km (3.85&nbsp;mi)
+| {{w|120347 Salacia|Salacia}} || 2.27×10^6 || {{w|Actaea (moon)|1}} || 1.41×10^7 || 6.21&nbsp;km (3.85&nbsp;mi)
 |-
-| {{w|Haumea}} || 8.14*10^6 || {{w|Moons of Haumea|2}} || {{w|Hiʻiaka (moon)
+| {{w|Haumea}} || 8.14×10^6 || {{w|Moons of Haumea|2}} || {{w|Hiʻiaka (moon)|(17.2×10^6)}}+{{w|Namaka (moon)|(2.57×10^6)}} || 2.43&nbsp;km (1.51&nbsp;mi)
 |-
-| {{w|50000 Quaoar|Quaoar}} || 3.78*10^6 || {{w|Weywot|1}} || 4.19*10^6 || 1.11&nbsp;km (0.69&nbsp;mi)
+| {{w|50000 Quaoar|Quaoar}} || 3.78×10^6 || {{w|Weywot|1}} || 4.19×10^6 || 1.11&nbsp;km (0.69&nbsp;mi)
 |-
-| {{w|225088 Gonggong|Gonggong}} || 4.75*10^6 || {{w|Xiangliu (moon)|1}} || 1.44*10^6 || 0.3 km (0.19 mi)
+| {{w|225088 Gonggong|Gonggong}} || 4.75×10^6 || {{w|Xiangliu (moon)|1}} || 1.44×10^6 || 0.3 km (0.19 mi)
 |-
-| {{w|Eris (dwarf planet)|Eris}} || (1.70±0.02)*10^7 || {{w|Dysnomia (moon)|1}} || 1.61*10^8 || 9.47 km (5.88 mi)
+| {{w|Eris (dwarf planet)|Eris}} || (1.70±0.02)×10^7 || {{w|Dysnomia (moon)|1}} || 1.61×10^8 || 9.47 km (5.88 mi)
 |}

@@ Line 30: / Line 30: @@
 {| class="wikitable"
 |-
-! Planet/<br>dwarf planet !! Surface area (km²) || Moons || Total volume (km³) || Moon shield thickness <!-- please add more info -->
+! Planet/<br>dwarf planet !! Surface area (km²) || Moons || Total volume (km³) || Moon shield thickness
 |-
-| {{w|Earth}} || 5.1007*10^8 || {{w|Moon|1}} || 2.196*10^10 || 43&nbsp;km (27&nbsp;mi)
+| {{w|Earth}} || 5.1007*10^8 || {{w|Moon|1}} || 2.196*10^10 || 43&nbsp;km (27&nbsp;mi) [4.86 {{w|Mount Everest}}s]
 |-
 | {{w|Mars}} || 1.4437*10^8 || {{w|Moons of Mars|2}} || {{w|Phobos (moon)|(5695±32)}}+{{w|Deimos (moon)|(1033±19)}} || 5&nbsp;cm (2&nbsp;in)
@@ Line 42: / Line 42: @@
 | {{w|Uranus}} || 8.1156*10^9 || {{w|Moons of Uranus|28}} || 5.61*10^9 || 0.69 km (0.43 mi)
 |-
-| {{w|Neptune}} || 7.6187*10^9 || {{w|Moons of Neptune|16}} || 1.04*10^10 || 1.36 km(0.84 mi)
+| {{w|Neptune}} || 7.6187*10^9 || {{w|Moons of Neptune|16}} || 1.04*10^10 || 1.36 km (0.84 mi)
 |-
 | {{w|Pluto}} || 1.7744*10^7 || {{w|Moons of Pluto|5}} || {{w|Charon (moon)|(9.322×10^8)}}+{{w|Moons of Pluto|(approx 87100+38800+900+200)}} || 52.5&nbsp;km (32.6&nbsp;mi) (by this comic's approximation)
@@ Line 69: / Line 69: @@
 This process described above assumes that all objects involved are completely spherical, which may not be the case. The act of tearing apart a solid moon, perhaps into rough gravel, might add microvoids to the new layering that bulk up the volume slightly. But neither are gravitational compression effects taken into account on an originally loose material; the planet's gravitational pull could settle some of the moon material into a slightly smaller volume than the one it occupied as lower-gravity moon.
-The planet below could also be marginally affected by the change in its total planet-and-armor mass, for rocky planets mostly within any {{w|pedosphere}} or previously exposed outer {{w|lithosphere}}. The interaction with {{w|Titan (moon)#Lakes|surface liquids}} and atmospheres, especially in planets defined {{w|Gas giant|primarily by their gas layers}}, would depend much upon how impermeable and/or rigid the chosen layering method made the additional material. One could imagine a spherical shell of moon matter around Jupiter with such high structural strength as to resist crumbling into its gaseous maw. Alternatively, the moon material could be expected to sink towards the gaseous planet's centre until it reaches a layer sufficiently dense and/or rigid to stop it sinking further. In this case the moon material would displace a volume of the planet's gas causing an increase in the planet's radius.
+The planet below could also be marginally affected by the change in its total planet-and-armor mass, for rocky planets mostly within any {{w|pedosphere}} or previously exposed outer {{w|lithosphere}}. The interaction with {{w|Titan (moon)#Lakes|surface liquids}} and atmospheres, especially in planets defined {{w|Gas giant|primarily by their gas layers}}, would depend much upon how impermeable and/or rigid the chosen layering method made the additional material. One could imagine a spherical shell of moon matter around Jupiter with such high structural strength as to resist crumbling into its gaseous maw. Alternatively, the moon material could be expected to sink towards the gaseous planet's center until it reaches a layer sufficiently dense and/or rigid to stop it sinking further. In this case the moon material would displace a volume of the planet's gas causing an increase in the planet's radius.
 ==Transcript==

@@ Line 56: / Line 56: @@
 | {{w|225088 Gonggong|Gonggong}} || || {{w|Xiangliu (moon)|1}} ||  ||
 |-
-| {{w|Eris (dwarf planet)|Eris}} || (1.70±0.02)*10^7 || {{w|Dysnomia (moon)|1}} || (1.22)*10^8 || 7.2 km (4.47 mi)
+| {{w|Eris (dwarf planet)|Eris}} || (1.70±0.02)*10^7 || {{w|Dysnomia (moon)|1}} || (1.61)*10^8 || 9.47 km (5.88 mi)
 |}