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		<updated>2026-04-13T15:49:09Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=1504:_Opportunity&amp;diff=108044</id>
		<title>1504: Opportunity</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=1504:_Opportunity&amp;diff=108044"/>
				<updated>2015-12-28T05:51:05Z</updated>
		
		<summary type="html">&lt;p&gt;TimberWolfer: Removed 2010 Odyssey sentence, as it held no relevance.&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 1504&lt;br /&gt;
| date      = March 27, 2015&lt;br /&gt;
| title     = Opportunity&lt;br /&gt;
| image     = opportunity.png&lt;br /&gt;
| titletext = We all remember those famous first words spoken by an astronaut on the surface of Mars: &amp;quot;That's one small step fo- HOLY SHIT LOOK OUT IT'S GOT SOME KIND OF DRILL! Get back to the ... [unintelligible] ... [signal lost]&amp;quot;&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic is talking about the robotic science platform {{w|Opportunity (rover)|''Opportunity''}}. On January 25, 2004, the Opportunity rover landed on the surface of {{w|Mars}} for the purpose of gathering data about the surface of Mars. Opportunity has proven remarkably robust, and the comic extrapolates the rover's resilience to absurdity for comedic effect. As of the release date of this comic in 2015, the Opportunity rover {{w|Opportunity mission timeline|is still alive and moving}}. &lt;br /&gt;
&lt;br /&gt;
The comic depicts the two scientists [[Ponytail]] and [[Hair Bun Girl]] at ground control being amazed at this fact already in 2010, and (maybe the same two) scientists continue to debate this at present day in the second panel.&lt;br /&gt;
&lt;br /&gt;
They mention another Martian rover, {{w|Spirit (rover)|''Spirit''}} that was also sent to Mars on the same date as Opportunity. Unfortunately, it became stuck and a sand storm covered its solar panels. On March 22, 2010, it was thought that Spirit's batteries finally ran out, marking the end of its mission. This was covered in [[695: Spirit]], in which the Spirit rover is also portrayed with an anthropomorphic personality.&lt;br /&gt;
&lt;br /&gt;
However, in 2023, Opportunity has apparently become so powerful that it has become dangerous, presumably cannibalizing or destroying the {{w|Mars 2020|rover sent in 2020}}.  [[Cueball]] and [[Megan]] note it even continues to operate without its original battery, suggesting it has developed a new power source.  This evolution is similar to the stories of {{w|HAL 9000}} (from {{w|2001: A Space Odyssey (film)|''2001: A Space Odyssey''}}) and {{w|List of Star Trek characters (T–Z)#V'Ger|V'Ger}} (from ''{{w|Star Trek: The Motion Picture}}''), both of which became dangerous to human beings.&lt;br /&gt;
&lt;br /&gt;
By 2450, humans have colonized and {{w|terraformed}} Mars. Maybe it is the 2023 Cueball and Megan's descendants that are looking out over their huge &amp;quot;kingdom&amp;quot; from the capital on Mars. However ''Opportunity'' is by now dominating half of the planet and will not allow humans to enter his dark reign. &lt;br /&gt;
&lt;br /&gt;
&amp;quot;Everything the light touches&amp;quot; is a reference to a line by {{w|List of The Lion King characters#Mufasa|Mufasa}} in ''{{w|The Lion King}}''. Mufasa's son Simba then asks &amp;quot;What about that shadowy place?&amp;quot; and Mufasa tells him &amp;quot;That is beyond our borders. You must never go there&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
The title text forecasts the first words of the first astronauts on the surface of Mars. At first, the astronaut copies the first words of {{w|Neil Armstrong}} on the Moon (&amp;quot;That's one small step for [a] man, one giant leap for mankind&amp;quot;) but it is interrupted by the ''Opportunity'' rover. On board the rover is a drill used for sampling rocks, but here it is heavily suggested that Opportunity uses the drill to attack the astronaut.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[The year (or year and first sentence) for each panel is written in a small frame at the top of each panel. It breaks the top frame of the panels.]&lt;br /&gt;
&lt;br /&gt;
:[Ponytail is sitting at a computer, facing left. Hair Bun Girl stands behind her.]&lt;br /&gt;
:2010:&lt;br /&gt;
:Ponytail: After six years, ''Spirit'' is down, but ''Opportunity'' is still going strong.&lt;br /&gt;
:Hair Bun: Tough little rover!&lt;br /&gt;
&lt;br /&gt;
:[Opportunity traveling on Mars. Text is written in frames with zigzag lines]&lt;br /&gt;
:2015:&lt;br /&gt;
:Off-screen: Eleven years, wow.&lt;br /&gt;
:Off-screen 2: Wasn't the original mission 90 days?&lt;br /&gt;
:Off-screen: This is starting to get weird.&lt;br /&gt;
&lt;br /&gt;
:[Cueball and Megan sitting at a computer, facing right.]&lt;br /&gt;
:2023:&lt;br /&gt;
:Cueball: The battery is totally disconnected. How can it still be moving??&lt;br /&gt;
:Megan: Given what it did to the Mars 2020 rover, we may never know.&lt;br /&gt;
&lt;br /&gt;
:[Two Martian inhabitants looking like Cueball and Megan stands on a cliff edge pointing towards a dark, mountainous region. Behind them are a tower and a hover car]&lt;br /&gt;
:2450, terraformed Mars, Martian imperial capital:&lt;br /&gt;
:Martian Cueball: Everything the light touches is our kingdom.&lt;br /&gt;
:Martian Megan: What's that dark area?&lt;br /&gt;
:Martian Cueball: That is ''Opportunity's'' half of the planet. We must never go there.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Robots]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics featuring Hair Bun Girl]]&lt;br /&gt;
[[Category:Multiple Cueballs]]&lt;br /&gt;
[[Category:Space]]&lt;/div&gt;</summary>
		<author><name>TimberWolfer</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:1061:_EST&amp;diff=101477</id>
		<title>Talk:1061: EST</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:1061:_EST&amp;diff=101477"/>
				<updated>2015-09-11T03:23:13Z</updated>
		
		<summary type="html">&lt;p&gt;TimberWolfer: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;quot;24 hours 4 minutes&amp;quot; because the period of rotation of the Earth is 24 hours MINUS four minutes.&lt;br /&gt;
&lt;br /&gt;
EST = Eastern Standard Time (USA) or England Standard Time (UK); there's no easy way to disambiguate this since it is a common time zone for English speakers in the USA and UK.&lt;br /&gt;
&lt;br /&gt;
&amp;quot;Run clocks backward&amp;quot; a possible reference to the leap second.&lt;br /&gt;
&lt;br /&gt;
&amp;quot;0.9144&amp;quot; because 1 yard = 0.9144 meters&lt;br /&gt;
&lt;br /&gt;
&amp;quot;triple 4 hours after every full moon&amp;quot; = add on an additional 12 hours every full moon, to make the time between full moons exactly 30 &amp;quot;days&amp;quot; (in real life it's 29.5 days). [[Special:Contributions/75.103.23.206|75.103.23.206]] 21:44, 7 December 2012 (UTC)&lt;br /&gt;
&lt;br /&gt;
: Erm, just like to say, as a UK resident for all my life (five decades, adult and child), that I've ''never'' heard of &amp;quot;English Standard Time&amp;quot;.  GMT is Greenwich ('Gren-itch') Mean Time, which is ''for most purposes'' the same as UTC (which officially took over in the early 70s, but most lay-people still ''say'' 'GMT') and all the various other prime standards in use (give or take leap seconds, planetary rotation/orbitting adjustments, adherence to atomic clocks, etc) and BST (British Summer Time, i.e. GMT+1)has just taken over for this sun-tilted part of the year.  A brief check of the usual reference sites reveals no sign of EST existing any time since any form of standardised &amp;quot;Railway Time&amp;quot; was originally instituted in the days of the Industrial Revolution, but I might have missed it.&lt;br /&gt;
&lt;br /&gt;
: Anyway, as such, the two ESTs is surely a constructed part of the joke not (as I read it) some fact from RL that needs explaining.  Yes, there's EST (Eastern Standard Time) for the US (and versions for Australia and elsewhere?), as well as main Egyptian time-zone and European Summer Time (actually a over-term for the three varieties: Western, Central and Eastern).  (The UK roughly matches up to Western European Time and Western European Summer Time accordingly, but that's by no means official except possibly by convention/shared heritage of definition.)  But I think the joke with the two 'EST's is ''purely'' to do with something like the whole Yard/Metre(/Meter) thing.  Although initially I imagined it might be something to do with UK/US Gallon differences, albeit that we now tend to have to use Litres.  Or, if you prefer, 'Liters'. ;) [[Special:Contributions/178.99.20.83|178.99.20.83]] 21:49, 1 April 2013 (UTC)&lt;br /&gt;
&lt;br /&gt;
I seem to recall that Narnia time ran usually much faster but sometimes much slower than real-world time. [[Special:Contributions/130.160.145.224|130.160.145.224]] 20:51, 10 March 2013 (UTC)&lt;br /&gt;
&lt;br /&gt;
I always thought that Taiwan, Province of China missed a golden opportunity here to establish propaganda that they founded it.  Instead they are known as a township in the US. [[Special:Contributions/66.88.136.254|66.88.136.254]] 20:01, 13 March 2013 (UTC)&lt;br /&gt;
&lt;br /&gt;
Think of what Jack Bauer could have done with 4 more minutes! {{unsigned ip|108.162.254.101}}&lt;br /&gt;
&lt;br /&gt;
Not all possible attempts to make the calendar simpler would make it as complicated (or worse) than it is. For example, removing one day each from January and August to make February have 30 or 31 like the rest of the months would make the calendar (slightly) simpler and more logical going forward.[[Special:Contributions/173.245.50.174|173.245.50.174]] 18:39, 7 September 2015 (UTC)&lt;br /&gt;
&lt;br /&gt;
This might be a reference to the old TV show Babylon 5 here, but that's unlikely because the show is never mentioned anywhere else.[[Special:Contributions/208.97.36.166|208.97.36.166]] 3:18, 11 September 2015 (UTC)&lt;/div&gt;</summary>
		<author><name>TimberWolfer</name></author>	</entry>

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