695: Spirit

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On January 26th, 2274 Mars days into the mission, NASA declared Spirit a 'stationary research station' expected to stay operational for several more months until the dust buildup on its solar panels forces a final shutdown.
Title text: On January 26th, 2274 Mars days into the mission, NASA declared Spirit a 'stationary research station' expected to stay operational for several more months until the dust buildup on its solar panels forces a final shutdown.


This comic explores what the Spirit rover's life would be like if it had a human personality. The rover lasted 5¼ active years on the Martian surface, far exceeding its expected mission duration of 90 Martian days. A sentient robot might assume that after its initially planned 90 Martian day mission was over, it would get to return home. This assumes, of course, that the rover never understood that the mission was a one-way trip, and that the expectation was that it would simply fail after ninety days. When no one comes to return it home, Spirit, possibly in a pun on its name, keeps its hopes alive while continuously analyzing rock after rock for years.

It would be cruelty of the absolute worst kind to abandon a human on an uninhabited planet with no intention of ever bringing them home,[citation needed] so it's horrifying when we see the rover in this way. It's a relief to us that the Spirit rover is just a programmed machine.

Opportunity, the rover's twin, lasted longer than Spirit and was shut down in February 2019 (2111: Opportunity Rover). More than five years after this comic, when Opportunity had passed a Marathon distance, Randall celebrated this rover with the comic 1504: Opportunity.

The title text has an apparent miscount: January 26, 2010, is more like sol (Martian day) 2156 by JPL's mission status site, not 2274.

The final contact with Spirit was on sol 2210 (March 22, 2010).

Alternative versions

The strip had a strong emotional impact on the fans of the rover, who created a number of alternative versions and endings for it.

In a blog post Randall mentioned this upbeat rewrite of the comic. Several others were made, including a silent one.

Many alternative endings were also proposed: some are sad, some sarcastic, some romantic, some look forward to the day when Spirit is finally recovered (this one was seen somewhere at CERN). Others imagine a future when the rover is not alone any more.


[The Spirit rover is on the surface of Mars.]
Day 1 of 90
Spirit (thinking): 89 days to go!
Day 88 of 90
Spirit (thinking): Two days until I go home!
Day 91 of 90
Spirit (thinking): ?
Day 103 of 90
Spirit (thinking): Maybe I didn't do a good enough job.
Day 127 of 90
Spirit (thinking): Maybe if I do a good enough job, they'll let me come home.
Day 857 of 90
Spirit (thinking): I thought I analyzed that rock really well.
Spirit (thinking): It's okay, I'll do the next one better.
Day 1328 of 90
Spirit (thinking): Sandstorm. Power dying.
Spirit (thinking): But a good rover would keep going. A good rover like they wanted.
Day 1944 of 90
Spirit (thinking): Oh no.
Spirit (thinking): I'm stuck.
Spirit (thinking): Did I do a good job?
Spirit (thinking): Do I get to come home?
Spirit (thinking): Guys?
[Spirit rests in the middle of a vast Martian landscape.]

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Uhh, I'm laughing on this comic for almost three , but this explain is still not complete:

- the mission was not only 90 days
- Spirit did many great investigations
- that "Free Spirit" campaign should be mentioned after it did stuck in the deep sand in early 2010
- and Opportunity is a still operating companion on Mars in 2013
- there is much more..., ask Randall!--Dgbrt (talk) 21:19, 10 June 2013 (UTC)

Do you guys really not see all the typos in this? not even the one in the first comment? -- (talk) (please sign your comments with ~~~~)

You see a problem? Fix it. Click "Edit" at the top and help improve the article! There is nothing you can do that can't be reversed with a few mouse clicks, so don't worry about messing things up. NealCruco (talk) 02:49, 10 August 2014 (UTC)

I just feel :'( SilverMagpie (talk) 03:38, 4 April 2017 (UTC)

I have no idea, but this particular comic makes me sad. Truly a tearjerker...Boeing-787lover 16:36, 19 May 2018 (UTC) -- Xkcdreader52 (talk) (please sign your comments with ~~~~)

Same. I'm going through all the comics reverse-chronologically and damn these last few ones have hit hard. 07:42, 11 February 2023 (UTC)

You folks do know about Spiritrover's LJ, right? Opportunity was Opportunitygrrl, and there was also Fuse-sat. Yngvadottir (talk) 21:41, 22 October 2018 (UTC)