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		<updated>2026-04-19T05:34:06Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=1402:_Harpoons&amp;diff=72712</id>
		<title>1402: Harpoons</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=1402:_Harpoons&amp;diff=72712"/>
				<updated>2014-08-01T16:41:32Z</updated>
		
		<summary type="html">&lt;p&gt;TD: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 1402&lt;br /&gt;
| date      = August 1, 2014&lt;br /&gt;
| title     = Harpoons&lt;br /&gt;
| image     = harpoons.png&lt;br /&gt;
| titletext = To motivate it to fire its harpoons hard enough, Rosetta's Philae lander has been programmed to believe it is trying to kill the comet.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
The latter peak on this graph refers to the {{w|Rosetta_(spacecraft)|Rosetta}} unmanned spacecraft. As part of its mission, it's carrying a lander (called {{w|Philae_(spacecraft)|Philae}}), which has two tethers to anchor itself to the comet 67P/Churyumov–Gerasimenko. Rosetta was launched in March 2004 (as shown in the graph) and is scheduled to encounter the comet in August 2014, making this a timely comic.&lt;br /&gt;
&lt;br /&gt;
The first peak is probably a joke. Officially, {{w|Apollo 12}} carried neither harpoons nor rum. However, as a former NASA contractor, Randall may know more about space shenanigans than the general public, and may be implying (perhaps jokingly) that a bottle of the Harpoon brand of Jamaican rum made it aboard.&lt;br /&gt;
&lt;br /&gt;
The caption implies that the spacecraft is sentient and believes that its mission is to kill the comet. This is likely a parody of the novel ''Moby Dick'', in which Captain Ahab hunts a sperm whale named Moby Dick using traditional harpoons out of vengeance for the whale's biting off his leg.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:'''Number of harpoons in space'''&lt;br /&gt;
:by year&lt;br /&gt;
:[A chart with a red graph is drawn below]&lt;br /&gt;
:[The y-axis]&lt;br /&gt;
:0 1 2 3&lt;br /&gt;
:[The x-axis]&lt;br /&gt;
:1950 1960 1970 1980 1990 2000 2010 2020&lt;br /&gt;
:[The graph is at zero until a sharp peak to 1 in 1970. The peak is labeled]&lt;br /&gt;
:Apollo 12 rum incident&lt;br /&gt;
:[The graph then stays at 0 until 2004. Then it rises to 2 and stays there until today, continuing as a dotted line after 2014. The rise is labeled]&lt;br /&gt;
:Rosetta comet mission launched carrying lander with harpoon tethers&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>TD</name></author>	</entry>

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