explain xkcd - User contributions [en]

3173: Satellite Imagery

2025-11-26T20:59:37Z

Starstar: /* Explanation */

{{comic
| number = 3173
| date = November 26, 2025
| title = Satellite Imagery
| image = satellite_imagery_2x.png
| imagesize = 429x526px
| noexpand = true
| titletext = Every weekend I take an ATV out into the desert and spend a day tracing a faint "(C) GOOGLE 2009" watermark across the landscape.
}}

==Explanation==
{{incomplete|This page was created recently. Don't remove this notice too soon.}}

In the title text Cueball aims to further confuse the remote sensing people by drawing a {{w|Watermark}} in the sand, leading people to believe the picture was taking in 2009.

==Transcript==
{{incomplete transcript|Don't remove this notice too soon.}}

:[[Cueball]] and [[Ponytail]] are standing in front of a board, which is displaying a satellite image of an empty area. However, in the middle of the image there is an square area which is pixelated as if it had been redacted.]

:Cueball: Wait, when was this imagery taken? Is this censorship the work of the contractor? One of our people? '''''Foreign agents?'''''
:Ponytail: Do we know who's operating a facility at that location?
:Cueball: We can't find '''''anything'''''.

:[Caption:]
:My hobby: Setting up big colored panels in the middle of nowhere as a prank on remote sensing people.

{{comic discussion}}<noinclude>

3173: Satellite Imagery

2025-11-26T20:53:45Z

Starstar:

{{comic
| number = 3173
| date = November 26, 2025
| title = Satellite Imagery
| image = satellite_imagery_2x.png
| imagesize = 429x526px
| noexpand = true
| titletext = Every weekend I take an ATV out into the desert and spend a day tracing a faint "(C) GOOGLE 2009" watermark across the landscape.
}}

==Explanation==
{{incomplete|This page was created recently. Don't remove this notice too soon.}}

==Transcript==
{{incomplete transcript|Don't remove this notice too soon.}}

:[[Cueball]] and [[Ponytail]] are standing in front of a board, which is displaying a satellite image of an empty area. However, in the middle of the image there is an square area which is pixelated as if it had been redacted.]

:Cueball: Wait, when was this imagery taken? Is this censorship the work of the contractor? One of our people? '''''Foreign agents?'''''
:Ponytail: Do we know who's operating a facility at that location?
:Cueball: We can't find '''''anything'''''.

:[Caption:]
:My hobby: Setting up big colored panels in the middle of nowhere as a prank on remote sensing people.

{{comic discussion}}<noinclude>

Talk:3037: Radon

2025-01-13T22:12:57Z

Starstar:

The sun is a white star. It looks yellow from within the atmosphere because blue light is scattered out of it, the same reason the sky is blue. How did physicist Randall not know that? [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 20:26, 13 January 2025 (UTC)
:Randall is almost certainly a Superman fan, and we all know that Kryptonians get their powers from yellow suns. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 21:07, 13 January 2025 (UTC)

Wikipedia disagrees; The Sun is a G-type main-sequence star (G2V), informally called a yellow dwarf, though its light is actually white. It formed approximately 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud. [[Special:Contributions/172.71.23.87|172.71.23.87]] 20:43, 13 January 2025 (UTC)
:Your quote agrees with me. As @Starstar says below, it might be intentional on his part. [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 20:53, 13 January 2025 (UTC)
:: No "his quote" doesn't?? (Unless I'm understanding your meaning with "his quote") Yes the sun is White. HOWEVER, it is NOT called a "white star". Stars aren't categorized by color but by tempeture. Which I mean I guess it sorta means their catagorized by color but thats being nitpicky. Our sun is 5,772 K, which according to wikipedia means its a class-G star which is known by the not nerds as a yellow dwarf. Being a physicist means Randell is VERY aware of the category of our Sun. Repeat, the Sun is called a "yellow dwarf", therefore is Ponytail said "white star", she'd be talking about a star that is 9000 K and therfor NOT our Sun. Seriously this was like a 5 minute google search. [[User:Apollo11|Apollo11]] ([[User talk:Apollo11|talk]]) 21:01, 13 January 2025 (UTC)
:: At any rate, I believe it plays into Ponytail just goofing around more than being precise [[User:Starstar|Starstar]] ([[User talk:Starstar|talk]]) 22:12, 13 January 2025 (UTC)

Perhaps it is intentional? [[User:Starstar|Starstar]] ([[User talk:Starstar|talk]]) 20:36, 13 January 2025 (UTC)

Possible trivia: The effect used in the title text for "²³⁸Umbrella" does NOT use html formatting. It uses unicode for the almost-but-not-technically superscripted "238" before "Umbrella." On some systems, this renders with the "23" being larger than and slightly below the level of the "8". Whether Randall knew of this effect or not is a mystery. If he did know, his motivations are a mystery. Maybe the 8 is radioactive and emitted a non-massless particle, thereby making it smaller (less mass != less volume, but go with it here) and more buoyant (less weight) in the presence of the adjacent characters. [[Special:Contributions/198.41.227.105|198.41.227.105]] 21:19, 13 January 2025 (UTC)
:You can't use HTML markup in the title attribute, so there's no other way to do super/sub-scripting there. He could have used JavaScript to emulate the title attribute, though. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 21:38, 13 January 2025 (UTC)

What do people think of Hairstylist Wannabe's near-total rewrite of the explanation? While they added lots of technical details about radon, I think they missed much of the humor. Ponytail's comments are typical of the kind of things a home inspector or repair person will say to the owner, not really "flippant". [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 21:48, 13 January 2025 (UTC)
:I like the facts but i changed the joke explantion back. [[User:Apollo11|Apollo11]] ([[User talk:Apollo11|talk]]) 22:07, 13 January 2025 (UTC)

3037: Radon

2025-01-13T22:11:44Z

2022-12-17T18:33:19Z

Starstar: /* Ships */

{{comic
| number = 2712
| date = December 16, 2022
| title = Gravity
| image = gravity_2x.png
| imagesize = 740x700px
| noexpand = true
| titletext = It's a long way down.
}}

*To experience the interactivity, visit the [http://xkcd.com/2712/ original comic].
==Explanation==
{{incomplete|Created by HOTBLACK DESIATO'S TAX RETURNS - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
In this interactive comic, the viewer pilots a small spaceship throughout a vast area in space. The viewer is capable of exploring various bodies and planets within the play area, many containing easter eggs alluding to What If? 2 and previous xkcd comics. The flight mechanics are largely, if not entirely, Newtonian, so the vessel is capable of using the gravity of planets to alter its trajectory or even enter orbit. The spaceship has several indicator circles around it which appear when a gravitational body comes into range, showing the direction towards their center of gravity.

The comic may not render properly on mobile devices, and it may require a keyboard to interact with. The arrow keys rotate the spaceship and accelerate it forward and backward.

After launching the spaceship, it is entirely possible to actually catch glimpses (for the fraction of a second) of other celestial bodies than the player's rocket, every 30 minutes or so, as long as the players keep pointing the nose of the rocket towards the gravity indicators.

Throughout the play area are coins that change your rocket ship into different rockets and non-space based vehicles, including humans.

The comic promotes Randall's new book [https://xkcd.com/what-if-2/ What If? 2], which was released in September and is available for purchase. Many of the planets contain references to various What If? articles.

The comic is similar to [[1608: Hoverboard]], which celebrated Thing Explainer instead.

===Spoiler Alert!===

The following is an incomplete table of features:

{|class="wikitable sortable"
!
!
!
! colspan="4"|References
!
|-
! Description
! Transcript
! Tiles (X, Y)
! What If
! XKCD
! Movies
! Other
! Explanation
|-
|'''Earth'''
|
|(14360, 14360)
|
|
|
|
|The starting planet. The player begins on the launch pad in a landed position.
|-
|'''Earth2'''
|
|(27867,-35648)
|
|
|
|
|A planet with among other things; a crane dropping a comet onto a dinosaur, a flagpole and a lake. landing on the right side of the lake brought me down to the earth's core. There's also two kids playing soccer. Catching the ball will turn the ship into a soccer ball
|-
|Earth's core
|
|
|
|
|
|
|[[Cueball]] and [[Megan]] floating in a small space in the center of the planet in inverted rotations.
|-
|'''Europa'''
|
|(13180, -2540)
|
|
|
|
|Europa, one of Jupiter's many moons (in real life). A broken, icy crust has a single path into its core.
|-
|Europa's crust
|"It's so unfair we don't get to compete in EuroVision."
"The region of the solar system where liquid water can exist on the surface is the habitable zone, and the region where it can exist beneath the surface of moons is the Eurozone."

"WHIRRRR"
|
|Y
|
|
|
|Europa's crust, with a single entrance into the core demarcated by an octopus leaving a hole.
Cueball states that Europa is in the Eurozone, a pun on the ''other'' Eurozone, with liquid underneath its surface.

A roomba whirs across the icy crust.

Cueball has a hairdryer and is melting the surface of the crust. A direct reference to [https://what-if.xkcd.com/35/ What If's Hairdryer].
|-
|Europa's core
|
|
|
|
|
|
|A watery ocean with octopi looking out into the great unknown using telescopes. This is a reference to octopus's intelligence here on earth! There's also a secret path leading to a book club, through the wreck of the Edmund Fitzgerald.
|-
|'''B-612'''
|"Asteroid deflection mission to earth. The package is delivered. Commencing planetary threat neutralization."
|(2610,3700)
|
|Y
|
|
|A reference to [https://xkcd.com/618/ Asteroid]. The little prince is having his asteroid blown up as it was heading towards Earth, apparently.
|-
|'''Dog park planet'''
|
|(1240, 11230)
|
|
|
|
|A planet with a dog park. Covered in dogs, along with dog walkers and some fences. There's a hole being dug by two dogs and a dog bone empty space in the center.
|-
|'''What If? 2 scenario planet'''
|
|
|
|
|
|
|
|-
|'''The Sun'''
|
|(-14950, 12080)
|
|
|
|
|Difficult to escape from if you hit the core.
|-
|Sun's core
|
|
|Y
|
|
|
|Difficult to escape from. Can be escaped by rotating around the sun until an escape-like velocity could be reached.
|-
|'''Soupiter'''
|
|(-800, -9040)
|Y
|
|
|
|A planet made of soup, with a core. As commented by Cueball, noodle soup. Has several small versions of other planets floating around it.
|-
|'''Earth without Japan'''
|
|(-7680, -5850)
|Y
|
|
|
|Earth, except it's missing japan.
|-
|'''Just Japan'''
|
|
|Y
|
|
|
|
|-
|'''A blob labeled "Pigeons"'''
|
|(-9020, -2490)
|Y
|
|
|
|A reference to Chapter 6 of What If? 2, where it would take 1.6 x 10^25 pigeons to lift you and a chair up to the halfway point of Australia's Q1 skyscraper.
|-
|'''Starship Enterprise'''
|
|
|
|
|Y
|
|Star Trek reference
|-
|'''Dinosaur planet'''
|
|
|
|
|Y
|
|An homage to [https://www.qwantz.com/ Dinosaur Comics], a webcomic Randall has mentioned several times before. All the dinosaurs on the planet are black-and-white versions of the clip art dinosaurs in that comic. Also references the Jurassic Park movies, in which the long grass depicted is a plot point in later films.
|-
|'''What If? 1 scenario planet'''
|
|
|
|
|
|
|
|-
|'''Cat blocking traffic flowing through portals'''
|
|
|
|
|
|
|
|-
|'''Edge of the Universe'''
|
|
|
|
|
|
|It looks like a planet labeled "edge of the universe". Outside the universe, so inside the "edge of the universe planet", is another universe, the bubble universe.
|-
|'''A tree larger than the planet it's growing on'''
|
|
|
|Y
|
|
|May be a reference to [https://www.explainxkcd.com/wiki/index.php/2:_Petit_Trees_(sketch) Petit Trees]. More probably, a reference to ''The Little Prince'', a french children's novel about a traveler from a distant asteroid. In the novel, baobab trees are a serious threat to the Prince's home asteroid, as they are so large that their roots would engulf the asteroid entirely. Randall has alluded to The Little Prince numerous times before, especially in what-if articles.
|-
|'''Milliways'''
|
|
|
|
|Y
|
|Hitchhiker's guide to the galaxy reference
|-
|'''The Great Attractor'''
|
|
|
|Y
|
|
|
|-
|'''Present'''
|"I didn't do any of my Christmas shopping yet because I was too busy drawing tiny planets."
"I'm done with my shopping! I got everyone What if? 2"

"...You got me my own book?"

"Yeah! I figured that since you wrote it, it must be right up your alley."

"It does make a good gift, though. You can get it at xkcd.com/whatif2"

"I got you this present!"

"Is it an angry bobcat?"

"It might not be."
|(22820,-18920)
|
|Y
|
|
|The XKCD cast react to giving each other What if 2? as a present. Gravity at the bottom of the missing quarter of the planet is inescapable. Black Hat gives Cueball a "gift" which he claims "might not be a bobcat", a reference to [[A-Minus-Minus]]
|-
|'''Black hole cluster'''
|
|
|
|
|
|
|A cluster of black holes with extremely high gravitational strength, set to the maximum of 2048. Not particularly easy to land on with multiple conflicting gravitational fields, but once landed on, rather difficult to escape.
|-
|'''Remnant'''
|"All right, that's close enough"
"Oh no"

"So don't delay, act now, supplies are running out"

"In 5 billion years, the Sun will run out of fuel and suffer gigennial burnout."

"The immense gravity of the sun's remnant means that this is the tallest possible skyscraper."
|(19620, 3800)
|
|
|
|
|A stellar remnant, with high gravity (making it difficult to escape, although it's possible to achieve escape velocity by flying sideways). Has various small landmarks, including a "skyscraper" and suspension bridge. There are bombs being dropped from above the planet, with one that seems to be sledding on the planet.
|}
===Ships===
{|class="wikitable sortable"
|-
! Name
! Description
! Location
! Image
|-
|Default
|The starting ship.
|
|-
| Tintin
|
| On the starting planet, relatively easy to get
|}

==Data Dump==

extracted from a JSON blob near the bottom of <code>https://xkcd.com/2712/comic.js</code>.
I believe this to be all the data but i'm not sure. this should probably be on a different page but i'll leave that up to the smart people
<pre style="height:10em;overflow-y:scroll;">
{
"items": {
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"effect": "transformship|ship-tintin",
"image": "coin",
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359,
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40,
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"coin-figure": {
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-15050,
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40,
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},
"coin-regular": {
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"effect": "transformship|ship2",
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"coin-soccerball": {
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},
"locations": {
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2610,
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"dogplanet": {
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1240,
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"goodhart": {
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},
"greatattractor": {
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"height": 4096,
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-297000,
-125000
],
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},
"japanmoon": {
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"qwantz": {
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"player": {
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"animcount": 4,
"startloc": [
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"targetheight": 59
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"tile_height": 1024,
"tile_source": "tile",
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}

</pre>
==Hacks==
'''Modes''' are activated by opening the Javascript Console (F12 [Or Command-Alt-I in most browsers under Mac OS X] to open Developer Tools, then Console tab) and writing corresponding commands.<br>
'''Click to expand:'''

<div class="mw-collapsible mw-collapsed leftAlign" style="width:100%">

*'''Googles:''' ''ze.googles()'' - returns a warning: "they do nothing!"
*'''Speedhack:''' ''ship.engines = "warp"'' - Speed hacking, sets speed to 1.4x. set to "standard" to reset to normal speed
*'''Chaos Mode''' ''ship.engines="infinite improbability drive" '' - Seems to randomly teleports the ship
*'''Insta Death''' ''ship.shields = false'' - Kill the player if they land on a planet, the code never sets it to false, so it seems to be always true.
*'''No Clip''' ''noclip = true'' - Enables noclip.
</div>

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Welcome!

To celebrate the world of what if? 2, here is your very own planet to explore!

Give someone the science question-and-answer book what if? 2 for Christmas:
xkcd.com/whatif2

{{comic discussion}}
[[Category:Space]]
[[Category:Book promotion]]
[[Category:Interactive comics]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Black Hat]]
[[Category:Bobcats]]

2712: Gravity

2022-12-17T18:32:59Z

User talk:Starstar

2021-12-17T21:55:43Z

Starstar:

You wanted to edit your talk page. Here you are. <span> — [[User:Sqrt-1|The <b>𝗦𝗾𝗿𝘁-𝟭</b>]] <sup>[[User talk:Sqrt-1|<span style="color: blue">talk</span>]] [[Special:Contributions/Sqrt-1|<span style="color: blue">stalk</span>]]</sup></span> 07:14, 16 December 2021 (UTC)

I am auto-confirmed now, but thanks anyways [[User:Starstar|Starstar]] ([[User talk:Starstar|talk]]) 21:55, 17 December 2021 (UTC)