Slashdot Mirror
Has the Mars Rover Sniffed Methane?
First time accepted submitter GrimAndBearIt writes "NASA's Curiosity rover is poised to settle years of debate on the question of atmospheric methane on Mars, which would be a sign of microbial life. With parts per trillion sensitivity, it's not so much a question of whether the rover will be able to smell trace amounts of methane, but rather a question of how much. NASA has announced that Grotzinger's team will discuss atmospheric measurements at a briefing on 2 November. If the rover has detected methane at sufficiently high concentration, or exhibiting temporal variations of the kind that suggests microbial activity, then it will surely motivate a desire to identify and map the sources."
8 posts so far, 8 fart jokes. I see space exploration is truly inspiring to Slashdot geeks...
"A door is what a dog is perpetually on the wrong side of" - Ogden Nash
I remember reading something on Slashdot *years* ago by someone (MBone?) that worked on Viking and still had some documents / protocol info in his garage.
Anyone who did work on Viking landers, I'd love to read what you think about this impending announcement.
Feel free to add any tales / memories that might be relevant; I'm sure there are some fascinating stories that could be told from a real space nerd.
Dammit, I wish I could find the original post referred to in my first line...
Cheers
http://en.wikipedia.org/wiki/Betteridge's_law_of_headlines
In absence of free oxygen in Mars atmosphere, it is probably quite stable.
No, quite the opposite actually- it gets destroyed (photodissociated) by -mainly- UV radiation.
Methane being unstable and easily destroyed in the Martian atmosphere is the whole point of using it as a 'life-tracer': if it is around at high and unaccounted for amounts, then there has to be continuously produced somehow, and so far a biological origin for its production cannot be ruled out.
The three laws of thermodynamics:(1) You can't win. (2) You can't break even. (3) You can't even quit.
Even if there is temporal variation, why are they so certain that the methane in the air is due biological activities?
They are not, in fact scientists have been really busy trying to come up with alternate explanations for the presence of methane on Mars. However, the indications that the methane may be due to life are strong enough to make this worth investigating even though the odds are probably rather slim.
Only to idiots, are orders laws.
-- Henning von Tresckow
Seriously? Do you have any idea just how fricking big a planet is? Although smaller than Earth, Mars is HHHUUUUGGGEEEE on human scales. And it is all empty. Barren. Desolate. Look out your window now, and imagine all the buildings, roads, people, animals, plants, rivers, oceans... everything except for the dirt and the rocks.. gone. All the way to the horizon. Just barren, rocky nothingness. Now imagine that from the horizon to the next horizon. And again, and again, and again. Imagine walking or driving for weeks or months through that landscape, seeing nothing but rocks, rocks, dirt and rocks. And you thought it was a long way down the road to the chemist.
Do you really think a few tiny bits of technology scattered here and there - hundreds or thousands of miles apart - are really going to spoil the view? And for who exactly? If there is life on Mars it's not exactly going to be worried about property prices. You could strip-mine an area the size of Brazil into a toxic sludgepile and still have infinitely more square kilometres of perfectly-preserved rocky boringness left over than you'd know what to do with.
The hard truth is, most of space is dead, dead, dead. There might be a lot of question marks in the Drake equation, but even with the most optimistic numbers, most of the of the worlds in this galaxy are just drab, sterile rocks floating in a vacuum, with nothing better to offer existence than to be explored and exploited by us. Undoubtedly there are pristine habitats and natural wonders out there worthy of preservation. Olympus Mons almost certainly counts among them. The Valles Marineres too, and doubtless other sites yet to be discovered. Yet another Martian plain, however, does not warrant UNESCO galactic heritage status, and even if it did I would still dispute your assertion that a little remote-controlled buggy driving over it is somehow ruining it forever.
And besides, even if we did find life on another world- not even intelligent or even multicellular life- then you can bet your luddite ass that NASA and their counterparts in other space programs would be insanely respectful of it. If Curiosity digs up a microbe on Mars, they'd be extra-triple sure their next mission was even less likely to bring Earth organisms to the planet than the last. Hell, they would probably seriously question whether to send anything else to the surface at all. And not just because they wouldn't want to contaminate the science - they'd do it because that microbe is important in its own right, and it would be wrong for us to jeopardise its survival, and because Mars rightfully belongs to the microbes.
Trying to portray our planet's space scientists as inconsiderate jerks firing shit up into space willy-nilly like a bunch of rednecks with a stack of beercans and a skeetshooter does no justice at all to a group of thoughtful, intelligent and passionate people who value the beauty and majesty of the heavens a thousand times more than you or I ever will.
The significant part of the observation will be the C13/C12 isotope ratio. Curiosity's SAM/TLS device can sort out carbon (and oxygen) isotopes. Enhanced C12 would suggest a biological source.
Joking aside, it is entirely possible that what the rover is detecting could be coming from the rover itself. There are all sorts of plastics on the rover: wiring insulation and cable ties, paint, adhesives, etc. that may be breaking down and giving off methane. There may be residues from the pyrotechnics that may be leaching traces of the gas. So yeah. It may be a case of "He who smelt it, dealt it".
When our name is on the back of your car, we're behind you all the way!
Actually, it's even older than that: There's apparently a Sumerian tablet from 1900 BCE with a fart joke. Aristophanes also was well known for writing fart jokes.
I am officially gone from