Talk:2762: Diffraction Spikes - Revision history

Psychoticpotato at 13:43, 6 May 2024

2024-05-06T13:43:46Z

172.68.110.169: gravity rulz

2023-04-15T16:12:12Z

gravity rulz

172.70.38.94 at 00:40, 15 April 2023

2023-04-15T00:40:33Z

172.70.86.153 at 20:42, 14 April 2023

2023-04-14T20:42:06Z

1844161 at 15:24, 14 April 2023

2023-04-14T15:24:21Z

172.71.242.172 at 08:11, 14 April 2023

2023-04-14T08:11:05Z

ClassicalGames: Solar storm

2023-04-14T06:07:56Z

Solar storm

172.70.110.215 at 22:15, 13 April 2023

2023-04-13T22:15:47Z

162.158.154.150 at 21:58, 13 April 2023

2023-04-13T21:58:47Z

172.69.58.86 at 20:33, 13 April 2023

2023-04-13T20:33:51Z

← Older revision		Revision as of 13:43, 6 May 2024
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	:{{Actual citation needed}} ...are you going by solar maxima? The weak 2014 one, and the 9-14 years we can generally get between them, makes 2023 off at the ''earliest'' of expectations... Perhaps 2025 is more likely.		:{{Actual citation needed}} ...are you going by solar maxima? The weak 2014 one, and the 9-14 years we can generally get between them, makes 2023 off at the ''earliest'' of expectations... Perhaps 2025 is more likely.
	:And we get maybe a few days warning of "a solar storm" (CME) that might happen to come our way. Carrington Events are rare, though, and even when 3+ CMEs a day happen (slightly after sunspot maximum, and up from the low frequency of one every five days), we're such a small target that it's still more or less the same amount of total dumb-luck (15-20x a fraction of a chance with a far greater (negative) order to it). [[Special:Contributions/172.70.86.153\|172.70.86.153]] 20:42, 14 April 2023 (UTC)		:And we get maybe a few days warning of "a solar storm" (CME) that might happen to come our way. Carrington Events are rare, though, and even when 3+ CMEs a day happen (slightly after sunspot maximum, and up from the low frequency of one every five days), we're such a small target that it's still more or less the same amount of total dumb-luck (15-20x a fraction of a chance with a far greater (negative) order to it). [[Special:Contributions/172.70.86.153\|172.70.86.153]] 20:42, 14 April 2023 (UTC)
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		+	I'm going to include this in the game I'm making. This is a really cool concept, a planet/civilization being dissected slowly by something it can't control. (BONUS: I'm going to be depressed for the rest of the day now.) [[User:Psychoticpotato\|Psychoticpotato]] ([[User talk:Psychoticpotato\|talk]]) 13:43, 6 May 2024 (UTC)

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 Exoplanets nevertheless exist because, alongside the visible diffraction spikes that chop them up, there are invisible defraction [sic] spikes that reassemble them. [[Special:Contributions/162.158.158.136|162.158.158.136]] 00:32, 13 April 2023 (UTC)
 :Pretty sure gravity causes the pieces to drift back together. [[Special:Contributions/172.69.58.86|172.69.58.86]] 20:33, 13 April 2023 (UTC)
 Why does the spike slice the planet instead of the planet breaking the tip off the spike? Are the spikes like enormous light sabers? [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:43, 13 April 2023 (UTC)

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 ::It's the sharp, angled edges that provide interference patterns (a set of "one-sided diffractions", rather than two-sided ones around an obstruction). A full round mirror on its own would not produce any spikes. Nor if the light from the edge areas cannot possibly reach the sensors, but that would mean less use of the mirror(s) they took great pains to send up there. And the secondary mirror ''has'' struts (in a Y-shape, I think, for technical reasons), thus why there's two minor spikes (actually six, but four are aligned to be hidden within the major spikes) as well as the hexagon-edge-induced set of six. Which also helps you understand in which orientation (or which two possibilities) the JWST was, in order to make any images you see from it.
 ::But this is already over-explained, really. You ''can'' design a mirror set to a avoid spikes, but with other technical compromises/etc. And above is correct, in that refractive telescopes can find themselves showing spikes (struts, if so designed, and other internal angles that may intrude into the light-path's edge). [[Special:Contributions/172.71.242.86|172.71.242.86]] 17:27, 13 April 2023 (UTC)
+:Diffraction spikes are also caused by window screens, dirty or scratched windscreens, and other optical blemishes.  Given the relative scarcity of telescopes these are what most people have actually encountered.[[Special:Contributions/172.70.38.94|172.70.38.94]] 00:40, 15 April 2023 (UTC)
 The transcript is very long... Too long : as of now, 2055 characters. That "transcript" section is intended for people who can't see the image (blind people for example), so it should be almost as fast to read as it is for you to look at the comic. There is really no need the exact angles of the diffraction spikes or anything, just a description of what's happening so that we can get the joke. You should not try to write a vectorization of the image, there are automated tools for that. [[Special:Contributions/172.71.122.208|172.71.122.208]] 18:04, 13 April 2023 (UTC)

← Older revision		Revision as of 20:42, 14 April 2023
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	I guess this refers to a solar storm predicted to go on in 2023, which does great damage to the earth's atmosphere like a spike. [[User:ClassicalGames\|ClassicalGames]] ([[User talk:ClassicalGames\|talk]]) 06:07, 14 April 2023 (UTC)		I guess this refers to a solar storm predicted to go on in 2023, which does great damage to the earth's atmosphere like a spike. [[User:ClassicalGames\|ClassicalGames]] ([[User talk:ClassicalGames\|talk]]) 06:07, 14 April 2023 (UTC)
		+	:{{Actual citation needed}} ...are you going by solar maxima? The weak 2014 one, and the 9-14 years we can generally get between them, makes 2023 off at the ''earliest'' of expectations... Perhaps 2025 is more likely.
		+	:And we get maybe a few days warning of "a solar storm" (CME) that might happen to come our way. Carrington Events are rare, though, and even when 3+ CMEs a day happen (slightly after sunspot maximum, and up from the low frequency of one every five days), we're such a small target that it's still more or less the same amount of total dumb-luck (15-20x a fraction of a chance with a far greater (negative) order to it). [[Special:Contributions/172.70.86.153\|172.70.86.153]] 20:42, 14 April 2023 (UTC)

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 :The spikes are stellar artifacts of distant observers, with all the mass of the star behind them. The Sun hardly moves much if you dunk the Earth into it, why should the exoplanet move the spike? At best you'd get a similar effect to karate chopping a stream of water from a hose. [[Special:Contributions/172.71.150.175|172.71.150.175]] 04:49, 13 April 2023 (UTC)
 ::Please stop dunking the Earth into the Sun.[[Special:Contributions/172.71.242.172|172.71.242.172]] 08:11, 14 April 2023 (UTC)
 Is it inspired by some movie that features this "spike pointing on some person" effect? I remember seeing one, but I don't seem to remember its name. [[User:Unreliable Connection|2659: Unreliable Connection]] ([[User talk:Unreliable Connection|talk]]) 02:07, 13 April 2023 (UTC)

← Older revision		Revision as of 06:07, 14 April 2023
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	Why is the asteroid belt mentioned in the explanation? [[Special:Contributions/172.71.222.129\|172.71.222.129]] 19:13, 13 April 2023 (UTC)k		Why is the asteroid belt mentioned in the explanation? [[Special:Contributions/172.71.222.129\|172.71.222.129]] 19:13, 13 April 2023 (UTC)k
	:If "all stars" have diffraction spikes, then there should be no planets around Sol. We exist, so Sol must be an exception to "all stars". But the asteroid belt (chopped-up planet(s)) also exists, so perhaps Sol had diffraction spikes sometime in its history. Yes, there's a real, and satisfactory, explanation for the Solar System's Jovian asteroid belt. But, context.[[Special:Contributions/162.158.154.150\|162.158.154.150]] 21:58, 13 April 2023 (UTC)		:If "all stars" have diffraction spikes, then there should be no planets around Sol. We exist, so Sol must be an exception to "all stars". But the asteroid belt (chopped-up planet(s)) also exists, so perhaps Sol had diffraction spikes sometime in its history. Yes, there's a real, and satisfactory, explanation for the Solar System's Jovian asteroid belt. But, context.[[Special:Contributions/162.158.154.150\|162.158.154.150]] 21:58, 13 April 2023 (UTC)
		+
		+	I guess this refers to a solar storm predicted to go on in 2023, which does great damage to the earth's atmosphere like a spike. [[User:ClassicalGames\|ClassicalGames]] ([[User talk:ClassicalGames\|talk]]) 06:07, 14 April 2023 (UTC)

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 The transcript is very long... Too long : as of now, 2055 characters. That "transcript" section is intended for people who can't see the image (blind people for example), so it should be almost as fast to read as it is for you to look at the comic. There is really no need the exact angles of the diffraction spikes or anything, just a description of what's happening so that we can get the joke. You should not try to write a vectorization of the image, there are automated tools for that. [[Special:Contributions/172.71.122.208|172.71.122.208]] 18:04, 13 April 2023 (UTC)
 Why is the asteroid belt mentioned in the explanation? [[Special:Contributions/172.71.222.129|172.71.222.129]] 19:13, 13 April 2023 (UTC)k
 :If "all stars" have diffraction spikes, then there should be no planets around Sol. We exist, so Sol must be an exception to "all stars". But the asteroid belt (chopped-up planet(s)) also exists, so perhaps Sol had diffraction spikes sometime in its history. Yes, there's a real, and satisfactory, explanation for the Solar System's Jovian asteroid belt. But, context.[[Special:Contributions/162.158.154.150|162.158.154.150]] 21:58, 13 April 2023 (UTC)

← Older revision		Revision as of 21:58, 13 April 2023
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	Why is the asteroid belt mentioned in the explanation? [[Special:Contributions/172.71.222.129\|172.71.222.129]] 19:13, 13 April 2023 (UTC)k		Why is the asteroid belt mentioned in the explanation? [[Special:Contributions/172.71.222.129\|172.71.222.129]] 19:13, 13 April 2023 (UTC)k
		+	:If "all stars" have diffraction spikes, then there should be no planets around Sol. We exist, so Sol must be an exception to "all stars". But the asteroid belt (chopped-up planet(s)) also exists, so perhaps Sol had diffraction spikes sometime in its history. Yes, there's a real, and satisfactory, explanation for the Solar System's Jovian asteroid belt. But, context.[[Special:Contributions/162.158.154.150\|162.158.154.150]] 21:58, 13 April 2023 (UTC)