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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3011:_Europa_Clipper&amp;diff=356816</id>
		<title>3011: Europa Clipper</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3011:_Europa_Clipper&amp;diff=356816"/>
				<updated>2024-11-14T18:01:32Z</updated>
		
		<summary type="html">&lt;p&gt;Civ1971: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3011&lt;br /&gt;
| date      = November 13, 2024&lt;br /&gt;
| title     = Europa Clipper&lt;br /&gt;
| image     = europa_clipper_2x.png&lt;br /&gt;
| imagesize = 333x356px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = They had BETTER make this a sample return mission.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&lt;br /&gt;
{{incomplete|Created by a JOVIAN DESSERT. Please consider deleting this tag too soon, but refrain from doing so.}}&lt;br /&gt;
&lt;br /&gt;
[[File:Animation of Europa Clipper trajectory around Jupiter.gif|thumb|right|The ''Europa Clipper's'' projected course around {{w|Jupiter}}, represented as the stationary &amp;lt;span style=&amp;quot;color:green;&amp;quot;&amp;gt;green&amp;lt;/span&amp;gt; dot. In &amp;lt;span style=&amp;quot;color:gold;&amp;quot;&amp;gt;gold&amp;lt;/span&amp;gt; is Jupiter's moon {{w|Callisto (moon)|Callisto}}, in &amp;lt;span style=&amp;quot;color:cyan;&amp;quot;&amp;gt;cyan&amp;lt;/span&amp;gt; is the moon {{w|Europa (moon)|Europa}} &amp;amp;mdash; the primary target of the spacecraft's study &amp;amp;mdash; and in &amp;lt;span style=&amp;quot;color:#FF4500;&amp;quot;&amp;gt;orange-red&amp;lt;/span&amp;gt; is the innermost of Jupiter's four {{w|Galilean moons|&amp;quot;Galilean&amp;quot;}} moons, {{w|Io (moon)|Io}}. The spacecraft's track is shown in &amp;lt;span style=&amp;quot;color:magenta;&amp;quot;&amp;gt;magenta&amp;lt;/span&amp;gt;. Jupiter's largest moon {{w|Ganymede (moon)|Ganymede}} is not shown, but its gravitational pull affects the ''Clipper's'' trajectory. A mission goal is to achieve a 6:1 {{w|orbital resonance}} with Europa by September 2034.[https://www.researchgate.net/profile/Martin-Ozimek/publication/383115312_AAS_24-433_Europa_Clipper_Mission_Analysis_Pump_Down_Trajectory_Design/links/66bcd845311cbb094938dbd6/AAS-24-433-Europa-Clipper-Mission-Analysis-Pump-Down-Trajectory-Design.pdf] ]]&lt;br /&gt;
&lt;br /&gt;
The ''{{w|Europa Clipper}}'' space probe was launched from the {{w|Kennedy Space Center}} in Florida on October 14, 2024. It is expected to arrive at Jupiter and begin exploration of Jupiter's moons, particularly {{w|Europa (moon)|Europa}}, in April of 2030. &lt;br /&gt;
&lt;br /&gt;
Europa is an icy moon. Water ice covers its surface. Beneath the ice, there is expected to be liquid water, which might contain living microbes.[https://europa.nasa.gov/why-europa/ingredients-for-life/] To sample this liquid, its crust (water ice) would need to be broken.&lt;br /&gt;
&lt;br /&gt;
Europa's icy surface may be compared to the caramelized crust on the popular dessert {{w|crème brûlée}}, which is traditionally cracked with a spoon before eating. The caramel cream dessert is believed to have been [https://archive.org/details/lagastronomieaug00sabb/page/272/mode/2up invented in Europe]. In {{w|Greek mythology}}, Europa was a {{w|Phoenician}} princess who {{w|Zeus}}, the king of the gods, abducted after transforming himself into a bull. Both the continent Europe and Jupiter's moon were named after Europa. Thus [[Randall]] suggests the spacecraft might encounter crème brûlée, and has therefore been equipped with a spoon for the purpose of collecting samples, as spoons are the traditional {{w|tableware}} provided for eating such desserts.[https://europa.nasa.gov/mission/about/] Perhaps because the {{w|Cassini-Huygens}} probe, after landing on the surface of Saturn's moon Titan in January of 2005, found that its surface had what was described as [https://www.sciencenews.org/article/world-unveiled-cr%C3%A8me-br%C3%BBl%C3%A9e-titan a &amp;quot;crème brûlée&amp;quot; consistency].&lt;br /&gt;
&lt;br /&gt;
No such spoon is present on the ''Europa Clipper.''{{cn}} Its course is designed to avoid contact with Europa so as to prevent {{w|Planetary protection|contamination by microorganisms from Earth}}. The spacecraft is, however, equipped with a magnetometer at the end of a 8.5 meter deployable boom. Deployable instruments on spacecraft have often failed to deploy correctly, so the successful deployment of any instrument is considered a cause for celebration.&lt;br /&gt;
&lt;br /&gt;
The title text expands on the joke by stating that the spacecraft &amp;quot;had BETTER&amp;quot; return samples of Europa to Earth. However, the ''Europa Clipper'' is not a {{w|sample-return mission}}.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[A space probe with two rectangular solar panels, a circular dish of the front, and a very large spoon extending beneath, longer than the span of both solar panels]&lt;br /&gt;
&lt;br /&gt;
:[Below the panel:]&lt;br /&gt;
:Good news: NASA's '''''Europa Clipper''''' is en route to Europa and has successfully deployed its crème brûlée spoon.&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
The Clipper spacecraft was at one point to be developed alongside a lander, which was later dropped from being part of the same (or very closely partnered) mission. The latest version of the {{w|Europa Lander}} proposal is far behind the Clipper in implementation, not yet even being guaranteed funding.&lt;br /&gt;
&lt;br /&gt;
Any actual sample return mission is currently far into the future of {{w|Ocean Worlds Exploration Program|the related plans for exploration}}, along with the possibility of digging deep enough into the ice to finally confirm or dismiss some of the more interesting theories about the world concerned.&lt;br /&gt;
&lt;br /&gt;
In Arthur C Clarke's novel '''2010''', the monolith aliens tell humanity ''&amp;quot;All these worlds are yours - except Europa. Attempt no landing there.&amp;quot;'' Contrary to the suggestion of the comic, no landing or any other physical interaction beyond observation of the surface of Europa is planned.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Space]]&lt;br /&gt;
[[Category:Space probes]]&lt;br /&gt;
[[Category:Food]]&lt;/div&gt;</summary>
		<author><name>Civ1971</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3011:_Europa_Clipper&amp;diff=356813</id>
		<title>3011: Europa Clipper</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3011:_Europa_Clipper&amp;diff=356813"/>
				<updated>2024-11-14T17:50:46Z</updated>
		
		<summary type="html">&lt;p&gt;Civ1971: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3011&lt;br /&gt;
| date      = November 13, 2024&lt;br /&gt;
| title     = Europa Clipper&lt;br /&gt;
| image     = europa_clipper_2x.png&lt;br /&gt;
| imagesize = 333x356px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = They had BETTER make this a sample return mission.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&lt;br /&gt;
{{incomplete|Created by a JOVIAN DESSERT. Please consider deleting this tag too soon, but refrain from doing so.}}&lt;br /&gt;
&lt;br /&gt;
[[File:Animation of Europa Clipper trajectory around Jupiter.gif|thumb|right|The ''Europa Clipper's'' projected course around {{w|Jupiter}}, represented as the stationary &amp;lt;span style=&amp;quot;color:green;&amp;quot;&amp;gt;green&amp;lt;/span&amp;gt; dot. In &amp;lt;span style=&amp;quot;color:gold;&amp;quot;&amp;gt;gold&amp;lt;/span&amp;gt; is Jupiter's moon {{w|Callisto (moon)|Callisto}}, in &amp;lt;span style=&amp;quot;color:cyan;&amp;quot;&amp;gt;cyan&amp;lt;/span&amp;gt; is the moon {{w|Europa (moon)|Europa}} &amp;amp;mdash; the primary target of the spacecraft's study &amp;amp;mdash; and in &amp;lt;span style=&amp;quot;color:#FF4500;&amp;quot;&amp;gt;orange-red&amp;lt;/span&amp;gt; is the innermost of Jupiter's four {{w|Galilean moons|&amp;quot;Galilean&amp;quot;}} moons, {{w|Io (moon)|Io}}. The spacecraft's track is shown in &amp;lt;span style=&amp;quot;color:magenta;&amp;quot;&amp;gt;magenta&amp;lt;/span&amp;gt;. Jupiter's largest moon {{w|Ganymede (moon)|Ganymede}} is not shown, but its gravitational pull affects the ''Clipper's'' trajectory. A mission goal is to achieve a 6:1 {{w|orbital resonance}} with Europa by September 2034.[https://www.researchgate.net/profile/Martin-Ozimek/publication/383115312_AAS_24-433_Europa_Clipper_Mission_Analysis_Pump_Down_Trajectory_Design/links/66bcd845311cbb094938dbd6/AAS-24-433-Europa-Clipper-Mission-Analysis-Pump-Down-Trajectory-Design.pdf] ]]&lt;br /&gt;
&lt;br /&gt;
The ''{{w|Europa Clipper}}'' space probe was launched from the {{w|Kennedy Space Center}} in Florida on October 14, 2024. It is expected to arrive at Jupiter and begin exploration of Jupiter's moons, particularly {{w|Europa (moon)|Europa}}, in April of 2030. &lt;br /&gt;
&lt;br /&gt;
Europa is an icy moon. Water ice covers its surface. Beneath the ice, there is expected to be liquid water, which might contain living microbes.[https://europa.nasa.gov/why-europa/ingredients-for-life/] To sample this liquid, its crust (water ice) would need to be broken.&lt;br /&gt;
&lt;br /&gt;
Europa's icy surface may be compared to the caramelized crust on the popular dessert {{w|crème brûlée}}, which is traditionally cracked with a spoon before eating. The carmel cream dessert is believed to have been [https://archive.org/details/lagastronomieaug00sabb/page/272/mode/2up invented in Europe]. In {{w|Greek mythology}}, Europa was a {{w|Phoenician}} princess who {{w|Zeus}}, the king of the gods, abducted after transforming himself into a bull. Both the continent Europe and Jupiter's moon were named after Europa. Thus [[Randall]] suggests the spacecraft might encounter crème brûlée, and has therefore been equipped with a spoon for the purpose of collecting samples, as spoons are the traditional {{w|tableware}} provided for eating such desserts.[https://europa.nasa.gov/mission/about/] Perhaps because the {{w|Cassini-Huygens}} probe, after landing on the surface of Saturn's moon Titan in January of 2005, found that its surface had what was described as [https://www.sciencenews.org/article/world-unveiled-cr%C3%A8me-br%C3%BBl%C3%A9e-titan a &amp;quot;crème brûlée&amp;quot; consistency].&lt;br /&gt;
&lt;br /&gt;
No such spoon is present on the ''Europa Clipper.''{{cn}} Its course is designed to avoid contact with Europa so as to prevent {{w|Planetary protection|contamination by microorganisms from Earth}}. The spacecraft is, however, equipped with a magnetometer at the end of a 8.5 meter deployable boom. Deployable instruments on spacecraft have often failed to deploy correctly, so the successful deployment of any instrument is considered a cause for celebration.&lt;br /&gt;
&lt;br /&gt;
The title text expands on the joke by stating that the spacecraft &amp;quot;had BETTER&amp;quot; return samples of Europa to Earth. However, the ''Europa Clipper'' is not a {{w|sample-return mission}}.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[A space probe with two rectangular solar panels, a circular dish of the front, and a very large spoon extending beneath, longer than the span of both solar panels]&lt;br /&gt;
&lt;br /&gt;
:[Below the panel:]&lt;br /&gt;
:Good news: NASA's '''''Europa Clipper''''' is en route to Europa and has successfully deployed its crème brûlée spoon.&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
The Clipper spacecraft was at one point to be developed alongside a lander, which was later dropped from being part of the same (or very closely partnered) mission. The latest version of the {{w|Europa Lander}} proposal is far behind the Clipper in implementation, not yet even being guaranteed funding.&lt;br /&gt;
&lt;br /&gt;
Any actual sample return mission is currently far into the future of {{w|Ocean Worlds Exploration Program|the related plans for exploration}}, along with the possibility of digging deep enough into the ice to finally confirm or dismiss some of the more interesting theories about the world concerned.&lt;br /&gt;
&lt;br /&gt;
In Arthur C Clarke's novel '''2010''', the monolith aliens tell humanity ''&amp;quot;All these worlds are yours - except Europa. Attempt no landing there.&amp;quot;'' Contrary to the suggestion of the comic, no landing or any other physical interaction beyond observation of the surface of Europa is planned.&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Space]]&lt;br /&gt;
[[Category:Space probes]]&lt;br /&gt;
[[Category:Food]]&lt;/div&gt;</summary>
		<author><name>Civ1971</name></author>	</entry>

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