Talk:2725: Sunspot Cycle
Holy cow, just made my first edit! It was SUPER stressful, and I didn't even know how to make a 'citation needed' thing. Hopefully it was ok, I tried to match the style of the wiki. GordonFreeman (talk) 03:06, 17 January 2023 (UTC)
- Welcome to explain xkcd then. Any edit that is not vandalism is a good edit, because it makes other think about what should be here. So even if it is later completely changed it got things going. --Kynde (talk) 08:05, 17 January 2023 (UTC)
Is it perhaps worth mentioning that sunspots, while they're darker than the rest of the sun's surface, are not actually black. They are cooler than surrounding regions and appear dark by contrast, but they're emitting lots of IR and some visible light. A sunspots-only (ignore the oxymoron) sun would still emit light and heat, just less. Nitpicking (talk) 03:18, 17 January 2023 (UTC)
Wouldn't the cycle be 20 ("every other decade") or 22 years (11 in each half of the cycle)? 162.158.166.173 03:51, 17 January 2023 (UTC)
- The cycle of darkness of the sun would be 22 years, but the 11-year cycle referred to in the comic, and described by both diagrams within the comic, is the cycle of "number of sunspots" which peaks when the sun is half light, half dark, and decreases again as there are so many spots that they start to merge into fewer, larger spots. It cycles from very few (or zero) sunspots, when the sun is light, through many sunspots, sun is heavily light/dark spotted, and completes the cycle when the number of spots returns down to near-zero, when the sun is dark. 172.70.85.201 (talk) (please sign your comments with ~~~~)
- Or to put it another way, at "peak sunspot" every 11 years, it would be equally accurate to describe the sun as being bright with dark spots or dark with bright spots. Akin to how the moon has a 29.5 day brightness cycle, but also a 14.75 day halfiness cycle.172.71.223.26 16:57, 17 January 2023 (UTC)
To what "financial crash of 2014" does this refer? I recall the housing crisis causing financial trouble, but that was around 2008. 162.158.166.173 03:51, 17 January 2023 (UTC)
- This has nothing to do with finance so if you think the peak at 2014 should have any meaning I think you are wrong. there where just for some reason more sunspots even though the sun was still in the dark period. Maybe most of the few huge sunspots broke into smaller but with only thin lines between, so still dark but the count goes up. Then they closed again later keeping the sun dark but the number of spots fluctuating. --Kynde (talk) 08:05, 17 January 2023 (UTC)
Does anyone have any idea what is supposed to be on the Y axis of the bottom graph? Something that goes up when the sun is transitioning between brightnesses and is at its lowest when the sun is either fully bright or fully dark? 108.162.241.213 (talk) (please sign your comments with ~~~~)
- It's the "number of spots" (whether light or dark), since a fully bright sun has no dark spots and a fully dark sun has no "light spots"Dextrous Fred (talk) 05:02, 17 January 2023 (UTC)
Did anyone else notice that the sine-wave is wrong? the trough should be the same every cycle, yet it's drawn as bright in the first trough and dark in the second trough. -Weylin Piegorsch 172.70.126.117 06:52, 17 January 2023 (UTC)
- If you reefer to the bottom graph it is correctly drawn. The sunspots number are near zero when the sun is bright in the first through and then it is again near zero when the sun is dark as there are then only one sunspot. So that is why it is alternating between light and dark for every through. Just as shown in the upper graph. --Kynde (talk) 08:05, 17 January 2023 (UTC)--Kynde (talk) 08:05, 17 January 2023 (UTC)
- Ah - the y axis of the upper graph is #subspots (which maximizes as they merge and minimizes at full dark/full bright), not magnitude of brightness. Thanks for the clarification! -Weylin Piegorsch 172.70.114.79 14:47, 17 January 2023 (UTC)
I do not think it is set in an alternate universe per se, but in the images of the sun spots the minimum brightness of the whole sun is subtracted. So only the sun spots stay visible. So the sun images are depictions of our sun. The number of sun spots loses common-sense meaning after merging starts. Sebastian --162.158.86.10 07:58, 17 January 2023 (UTC)
- Well since the sun is dark in this universe for 10 years, then it cannot be our universe, and since they also have 90s memes, then it is either a parallel universe or well... Randall's fantasy :-) --Kynde (talk) 08:05, 17 January 2023 (UTC)
I didn't have enough space in my last edit summary to explain my change. As if anyone who needs to really reads those, anyway... So here (unconstrained by petty character limits!) is why I took off the apostrophes in "90's kid", etc...:
/* Explanation */ Removing apostrophes not used by Randall. (I would personally say '90s, the apostrophe being for the contraction of 1990s, but here only the quoting-apostrophes of '90s kid' seems necessary and capable of being consistent. "The 90s" is a pluralisation of all years of the decade based upon (19)90. A kid *of* the 90s could be a 90s' kid, but I think we're intended to treat this as an adjectival descriptor, not a posessive element.)
And I outright reject the idea that apostrophes can ever be used for pluralising, despite some 'authorities' on the matter. Especially where it clashes with plural-possessive, contraction and single-quoting uses in a single case, upon a wiki where doubled-up apostrophes would incite italics. Better to rewrite. But, for now, I've just rationalised to go with actual demonstrated usage (both from Randall and more or less in general) and intent. 172.70.85.133 10:27, 17 January 2023 (UTC)
- Well, I don't think there's any value in spending 000's of hours debating it.172.70.85.46 15:13, 17 January 2023 (UTC)
Does this remind anyone else of oscillations in population dynamics (increase in population eventually causes overpopulation and triggers a period of reduction before the population starts to recover, etc.)? 172.70.85.201 15:24, 17 January 2023 (UTC)
- I had thought to say that a budding sunspot would become 'dark' if it was forming on light surface and 'light' if forming on darkened surface, which has a relationship with some biological population frequencies/responses (even within the same population, an expressed variation can be linked to the perception of what is/is not lacking in its fellows or just various overlapping territories). But a simple scenario (of instantaneous points; having the choice of locale to materialise, or else the accident of 'birth' into any given situation from which to sway their appearance) would settle into an equilibreum as a slightly more than half-dark Sun would spawn proportionately more 'light spots' than a slightly more than half-light one.
- It needs to have a time-delayed aspect (as with natural creature populations, a post-gestation glut being based upon pre-gestation plenty; or upon the opposite negatively influencing pressures), so budding might start (and be fixed into its identity) years before it becomes a visible member of the population. A resonant hysteresis, of some kind? 172.70.85.132 16:20, 17 January 2023 (UTC)
Is there a way to shrink the size of the comic?
Is there some way to shrink the size of the comic? It startled me a little bit when I typed in the URL of this website and saw this taking up a large amount of space, with me initially thinking that this was just another stupid case of vandalism. SilverTheTerribleMathematician (talk) 16:32, 17 January 2023 (UTC)
