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		<id>https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=File%3Asolar_system_compression_artifacts.png</id>
		<title>File:solar system compression artifacts.png - Revision history</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=File%3Asolar_system_compression_artifacts.png"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;action=history"/>
		<updated>2026-04-17T20:32:47Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=394714&amp;oldid=prev</id>
		<title>DollarStoreBa'al at 14:12, 3 December 2025</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=394714&amp;oldid=prev"/>
				<updated>2025-12-03T14:12:52Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 14:12, 3 December 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The Voyager spacecraft has reached the outer boundaries of the Solar System which is nominally divided into sections such as the 'heliosphere', although there are no ''actual'' definitive demarcations and there are both arbitrary thresholds and transient fluctuations. If this were a typical real digital image with insufficient depth of subtlety, brightness gradation would show up as bands of intensity joined by digital compression effects, in a 'darker to lighter' progression just like in this graphic. The joke here is that those artefact gradations actually exist in space!&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The Voyager spacecraft has reached the outer boundaries of the Solar System which is nominally divided into sections such as the 'heliosphere', although there are no ''actual'' definitive demarcations and there are both arbitrary thresholds and transient fluctuations. If this were a typical real digital image with insufficient depth of subtlety, brightness gradation would show up as bands of intensity joined by digital compression effects, in a 'darker to lighter' progression just like in this graphic. The joke here is that those artefact gradations actually exist in space!&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:Comic images]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>DollarStoreBa'al</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=222582&amp;oldid=prev</id>
		<title>172.70.90.91: The awful and seemingly arbitrary commas annoyed me. But it really needed a rewrite beyond that. Actually why is this text actually here and not on the main-explain page? Given that it is, however, I'll edit it.</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=222582&amp;oldid=prev"/>
				<updated>2021-12-14T19:32:14Z</updated>
		
		<summary type="html">&lt;p&gt;The awful and seemingly arbitrary commas annoyed me. But it really needed a rewrite beyond that. Actually why is this text actually here and not on the main-explain page? Given that it is, however, I&amp;#039;ll edit it.&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 19:32, 14 December 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The Voyager spacecraft has reached the outer boundaries of the Solar System&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;which&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;is divided into sections&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;such as&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;the 'heliosphere', &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;which have, &lt;/del&gt;no&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;actual&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;demarcations. If this were a real&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, typical, &lt;/del&gt;digital image, brightness &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;gradations &lt;/del&gt;would show up&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;as digital compression, in a 'darker to lighter' progression&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;like in this graphic. The joke&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;is&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;that&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;those gradations actually exist in space!&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The Voyager spacecraft has reached the outer boundaries of the Solar System which is &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;nominally &lt;/ins&gt;divided into sections such as the 'heliosphere', &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;although there are &lt;/ins&gt;no &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;''&lt;/ins&gt;actual&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'' definitive &lt;/ins&gt;demarcations &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;and there are both arbitrary thresholds and transient fluctuations&lt;/ins&gt;. If this were a &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;typical &lt;/ins&gt;real digital image &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;with insufficient depth of subtlety&lt;/ins&gt;, brightness &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;gradation &lt;/ins&gt;would show up as &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;bands of intensity joined by &lt;/ins&gt;digital compression &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;effects&lt;/ins&gt;, in a 'darker to lighter' progression &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;just &lt;/ins&gt;like in this graphic. The joke &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;here &lt;/ins&gt;is that those &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;artefact &lt;/ins&gt;gradations actually exist in space!&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.70.90.91</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=222577&amp;oldid=prev</id>
		<title>172.70.114.105: Digital compression contrast</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=222577&amp;oldid=prev"/>
				<updated>2021-12-14T17:13:45Z</updated>
		
		<summary type="html">&lt;p&gt;Digital compression contrast&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 17:13, 14 December 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The Voyager spacecraft has reached the outer boundaries of the Solar System, which, is divided into sections, such as, the 'heliosphere'. If this were a real, typical, digital image, brightness gradations would show up, in a 'darker to lighter' progression, like&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, &lt;/del&gt;in this graphic. The joke, is, that, those gradations actually exist in space!&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The Voyager spacecraft has reached the outer boundaries of the Solar System, which, is divided into sections, such as, the 'heliosphere'&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, which have, no, actual, demarcations&lt;/ins&gt;. If this were a real, typical, digital image, brightness gradations would show up&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, as digital compression&lt;/ins&gt;, in a 'darker to lighter' progression, like in this graphic. The joke, is, that, those gradations actually exist in space!&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.70.114.105</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=222576&amp;oldid=prev</id>
		<title>172.70.34.191: Digital brightness gradations</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=222576&amp;oldid=prev"/>
				<updated>2021-12-14T17:09:32Z</updated>
		
		<summary type="html">&lt;p&gt;Digital brightness gradations&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 17:09, 14 December 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;The Voyager spacecraft has reached the outer boundaries of the Solar System, which, is divided into sections, such as, the 'heliosphere'. If this were a real, typical, digital image, brightness gradations would show up, in a 'darker to lighter' progression, like, in this graphic. The joke, is, that, those gradations actually exist in space!&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.70.34.191</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=205085&amp;oldid=prev</id>
		<title>DgbrtBOT at 22:22, 20 January 2021</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=File:solar_system_compression_artifacts.png&amp;diff=205085&amp;oldid=prev"/>
				<updated>2021-01-20T22:22:06Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&lt;/div&gt;</summary>
		<author><name>DgbrtBOT</name></author>	</entry>

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