https://www.explainxkcd.com/wiki/index.php?action=history&feed=atom&title=Talk%3A3234%3A_Europa_Missions 2026-04-24T17:03:44Z Revision history for this page on the wiki MediaWiki 1.30.0 https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410774&oldid=prev 2026-04-21T12:26:23Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 12:26, 21 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l4" >Line 4:</td> <td colspan="2" class="diff-lineno">Line 4:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:They probably do like 8L/h and cover about 8000 m^2/h. So if they had 30 litre tanks, you would need 1 billion zambonis (0.03 km^2 each), and they would take 4 hours. Or for 1 month : 5 million Zambonis, refueled 200 times each (30 billion litres propane total). For constant resurfacing, like a normal ice rink (~10 times a day), you would need 2 billion zambonis running constantly (90 terawatts). [[User:Sameldacamel34|Sameldacamel34]] ([[User talk:Sameldacamel34|talk]]) 08:41, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:They probably do like 8L/h and cover about 8000 m^2/h. So if they had 30 litre tanks, you would need 1 billion zambonis (0.03 km^2 each), and they would take 4 hours. Or for 1 month : 5 million Zambonis, refueled 200 times each (30 billion litres propane total). For constant resurfacing, like a normal ice rink (~10 times a day), you would need 2 billion zambonis running constantly (90 terawatts). [[User:Sameldacamel34|Sameldacamel34]] ([[User talk:Sameldacamel34|talk]]) 08:41, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:: I think for the complete covering option you'd need at least one zamboni to rotate in place, as a consequence of the hairy ball theorem. [[Special:Contributions/137.25.230.78|137.25.230.78]] 15:58, 18 April 2026 (UTC) &lt;!-- I would have mentioned that, if you hadn't gotten there before me..! --&gt;</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:: I think for the complete covering option you'd need at least one zamboni to rotate in place, as a consequence of the hairy ball theorem. [[Special:Contributions/137.25.230.78|137.25.230.78]] 15:58, 18 April 2026 (UTC) &lt;!-- I would have mentioned that, if you hadn't gotten there before me..! --&gt;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">:::You don't need a rotating one, just one on a great circle that covers any spot that isn't being covered by any other. [[User:SDSpivey|SDSpivey]] ([[User talk:SDSpivey|talk]]) 12:26, 21 April 2026 (UTC)</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"></td><td class='diff-marker'>&#160;</td><td style="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;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>Is Randall confusing the Jupiter Icy Moons Orbiter and Jupiter Icy Moons Explorer here? [https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer wikipedia link]</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>Is Randall confusing the Jupiter Icy Moons Orbiter and Jupiter Icy Moons Explorer here? [https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer wikipedia link]</div></td></tr> </table>

SDSpivey https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410700&oldid=prev 2026-04-21T04:45:53Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 04:45, 21 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17" >Line 17:</td> <td colspan="2" class="diff-lineno">Line 17:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"></td><td class='diff-marker'>&#160;</td><td style="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;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>Playing hockey underwater isn't as tough as you might think:&#160; https://en.wikipedia.org/wiki/Underwater_hockey</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>Playing hockey underwater isn't as tough as you might think:&#160; https://en.wikipedia.org/wiki/Underwater_hockey</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">: I wouldn't wish this on my worst enemy. Doing physical activites in water is just the worst (Except swimming like a normal person in a pool, thats the exception). Respect to all the marine labourers out there. [[User:RG|RG]] ([[User talk:RG|talk]]) 04:45, 21 April 2026 (UTC)</ins></div></td></tr> </table>

RG https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410682&oldid=prev 2026-04-21T01:11:36Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 01:11, 21 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l15" >Line 15:</td> <td colspan="2" class="diff-lineno">Line 15:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>Is this a joke about the NHL expanding to Europe? --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 06:37, 20 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>Is this a joke about the NHL expanding to Europe? --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 06:37, 20 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>: That's how I took it, as a joke on the silly Americans confusing Europa with Europe. (As a silly American, I get to say this) [[Special:Contributions/130.76.187.47|130.76.187.47]] 13:44, 20 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>: That's how I took it, as a joke on the silly Americans confusing Europa with Europe. (As a silly American, I get to say this) [[Special:Contributions/130.76.187.47|130.76.187.47]] 13:44, 20 April 2026 (UTC)</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">Playing hockey underwater isn't as tough as you might think:&#160; https://en.wikipedia.org/wiki/Underwater_hockey</ins></div></td></tr> </table>

2600:1700:AF6:A610:6FF7:BD1C:1AFA:32CD https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410652&oldid=prev 2026-04-20T13:44:12Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 13:44, 20 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l14" >Line 14:</td> <td colspan="2" class="diff-lineno">Line 14:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"></td><td class='diff-marker'>&#160;</td><td style="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;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>Is this a joke about the NHL expanding to Europe? --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 06:37, 20 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>Is this a joke about the NHL expanding to Europe? --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 06:37, 20 April 2026 (UTC)</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">: That's how I took it, as a joke on the silly Americans confusing Europa with Europe. (As a silly American, I get to say this) [[Special:Contributions/130.76.187.47|130.76.187.47]] 13:44, 20 April 2026 (UTC)</ins></div></td></tr> </table>

130.76.187.47 https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410648&oldid=prev 2026-04-20T06:37:51Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 06:37, 20 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l12" >Line 12:</td> <td colspan="2" class="diff-lineno">Line 12:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>::: That's what they want you to think. &quot;170 to 2 due to burrowing&quot; was just not acceptable for the Confederacy's teams managers. [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:34, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>::: That's what they want you to think. &quot;170 to 2 due to burrowing&quot; was just not acceptable for the Confederacy's teams managers. [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:34, 18 April 2026 (UTC)</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">Is this a joke about the NHL expanding to Europe? --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 06:37, 20 April 2026 (UTC)</ins></div></td></tr> </table>

Coconut Galaxy https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410632&oldid=prev 2026-04-18T23:35:51Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 23:35, 18 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11" >Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>−</td><td style="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;"><div>::: <del class="diffchange diffchange-inline">Thats </del>what they want you to think. &quot;170 to 2 due to burrowing&quot; was just not acceptable for the Confederacy's teams managers. [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:34, 18 April 2026 (UTC)</div></td><td class='diff-marker'>+</td><td style="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;"><div>::: <ins class="diffchange diffchange-inline">That's </ins>what they want you to think. &quot;170 to 2 due to burrowing&quot; was just not acceptable for the Confederacy's teams managers. [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:34, 18 April 2026 (UTC)</div></td></tr> </table>

2001:861:3F07:A020:A19A:2BA:622D:DCA4 https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410631&oldid=prev 2026-04-18T23:35:22Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 23:35, 18 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11" >Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>−</td><td style="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;"><div>::: Thats what they want you to think. &quot;170 to 2 due to <del class="diffchange diffchange-inline">burrowwing</del>&quot; was just not acceptable for the Confederacy's teams managers. [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:34, 18 April 2026 (UTC)</div></td><td class='diff-marker'>+</td><td style="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;"><div>::: Thats what they want you to think. &quot;170 to 2 due to <ins class="diffchange diffchange-inline">burrowing</ins>&quot; was just not acceptable for the Confederacy's teams managers. [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:34, 18 April 2026 (UTC)</div></td></tr> </table>

2001:861:3F07:A020:A19A:2BA:622D:DCA4 https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410630&oldid=prev 2026-04-18T23:34:45Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 23:34, 18 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11" >Line 11:</td> <td colspan="2" class="diff-lineno">Line 11:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">::: Thats what they want you to think. &quot;170 to 2 due to burrowwing&quot; was just not acceptable for the Confederacy's teams managers. [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:34, 18 April 2026 (UTC)</ins></div></td></tr> </table>

2001:861:3F07:A020:A19A:2BA:622D:DCA4 https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410629&oldid=prev 2026-04-18T23:30:35Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 23:30, 18 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3" >Line 3:</td> <td colspan="2" class="diff-lineno">Line 3:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:Europa has a surface area of about 3.061×10^7 km^2. A zamboni seems to cover about a 1.2 m^2 area (about 0.6m by 2m) at any given time. So if you simply cover all of Europa in zambonis (only like 3 trillion) and then drive them all forward their own length at the same time without crashing them into each other. So probably less than 3 trillion would be my guess (Also probably more than 2).</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:Europa has a surface area of about 3.061×10^7 km^2. A zamboni seems to cover about a 1.2 m^2 area (about 0.6m by 2m) at any given time. So if you simply cover all of Europa in zambonis (only like 3 trillion) and then drive them all forward their own length at the same time without crashing them into each other. So probably less than 3 trillion would be my guess (Also probably more than 2).</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>:They probably do like 8L/h and cover about 8000 m^2/h. So if they had 30 litre tanks, you would need 1 billion zambonis (0.03 km^2 each), and they would take 4 hours. Or for 1 month : 5 million Zambonis, refueled 200 times each (30 billion litres propane total). For constant resurfacing, like a normal ice rink (~10 times a day), you would need 2 billion zambonis running constantly (90 terawatts). [[User:Sameldacamel34|Sameldacamel34]] ([[User talk:Sameldacamel34|talk]]) 08:41, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>:They probably do like 8L/h and cover about 8000 m^2/h. So if they had 30 litre tanks, you would need 1 billion zambonis (0.03 km^2 each), and they would take 4 hours. Or for 1 month : 5 million Zambonis, refueled 200 times each (30 billion litres propane total). For constant resurfacing, like a normal ice rink (~10 times a day), you would need 2 billion zambonis running constantly (90 terawatts). [[User:Sameldacamel34|Sameldacamel34]] ([[User talk:Sameldacamel34|talk]]) 08:41, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>−</td><td style="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;"><div>:: I think for the complete covering option you'd need at least one zamboni to rotate in place, as a consequence of the hairy ball theorem. [[Special:Contributions/137.25.230.78|137.25.230.78]] 15:58, 18 April 2026 (UTC)</div></td><td class='diff-marker'>+</td><td style="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;"><div>:: I think for the complete covering option you'd need at least one zamboni to rotate in place, as a consequence of the hairy ball theorem. [[Special:Contributions/137.25.230.78|137.25.230.78]] 15:58, 18 April 2026 (UTC) <ins class="diffchange diffchange-inline">&lt;!-- I would have mentioned that, if you hadn't gotten there before me..! --&gt;</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"></td><td class='diff-marker'>&#160;</td><td style="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;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>Is Randall confusing the Jupiter Icy Moons Orbiter and Jupiter Icy Moons Explorer here? [https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer wikipedia link]</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>Is Randall confusing the Jupiter Icy Moons Orbiter and Jupiter Icy Moons Explorer here? [https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer wikipedia link]</div></td></tr> <tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l10" >Line 10:</td> <td colspan="2" class="diff-lineno">Line 10:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>The hovertext leaves ambiguity between the transitive and intransitive meanings of &quot;resurface&quot;, leading to me imagining a Zamboni Voyager mission profile that involves cracking through the ice layer just to make moonfall and then climbing out of the ocean somehow. [[Special:Contributions/108.71.212.208|108.71.212.208]] 17:09, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>The hovertext leaves ambiguity between the transitive and intransitive meanings of &quot;resurface&quot;, leading to me imagining a Zamboni Voyager mission profile that involves cracking through the ice layer just to make moonfall and then climbing out of the ocean somehow. [[Special:Contributions/108.71.212.208|108.71.212.208]] 17:09, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously sharp part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">:: That's just a standard(-looking) Zamboni machine sat on top of a booster/lander chasis that's currently firing its main rocket... [[Special:Contributions/81.179.199.253|81.179.199.253]] 23:30, 18 April 2026 (UTC)</ins></div></td></tr> </table>

81.179.199.253 https://www.explainxkcd.com/wiki/index.php?title=Talk:3234:_Europa_Missions&diff=410628&oldid=prev 2026-04-18T23:09:55Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 23:09, 18 April 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l9" >Line 9:</td> <td colspan="2" class="diff-lineno">Line 9:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"></td><td class='diff-marker'>&#160;</td><td style="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;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="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;"><div>The hovertext leaves ambiguity between the transitive and intransitive meanings of &quot;resurface&quot;, leading to me imagining a Zamboni Voyager mission profile that involves cracking through the ice layer just to make moonfall and then climbing out of the ocean somehow. [[Special:Contributions/108.71.212.208|108.71.212.208]] 17:09, 18 April 2026 (UTC)</div></td><td class='diff-marker'>&#160;</td><td style="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;"><div>The hovertext leaves ambiguity between the transitive and intransitive meanings of &quot;resurface&quot;, leading to me imagining a Zamboni Voyager mission profile that involves cracking through the ice layer just to make moonfall and then climbing out of the ocean somehow. [[Special:Contributions/108.71.212.208|108.71.212.208]] 17:09, 18 April 2026 (UTC)</div></td></tr> <tr><td class='diff-marker'>−</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously <del class="diffchange diffchange-inline">sharpr </del>part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td><td class='diff-marker'>+</td><td style="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;"><div>: The Zamboni Voyager also has a suspiciously <ins class="diffchange diffchange-inline">sharp </ins>part on the bottom side, which could conceivably support this view. Resurfacing would probaly involve 3-D manoeuvres not necessarily allowed in 2-D Hockey on Earth. But the Federation MUST EXPAND [[Special:Contributions/2001:861:3F07:A020:A19A:2BA:622D:DCA4|2001:861:3F07:A020:A19A:2BA:622D:DCA4]] 23:09, 18 April 2026 (UTC)</div></td></tr> </table>

2001:861:3F07:A020:A19A:2BA:622D:DCA4