Re:Are Those Spidery Black Things On Mars Dangerous?
by gwern on Wednesday October 03, 2012 @01:26PM
(#4608550)
Yeah; just for starters, such a sandy area seems like a serious risk on its own to a rover, never mind the risk actual geysers would pose. The geysers are interesting, but are they worth jeopardizing an entire rover expedition for?
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Re:Are Those Spidery Black Things On Mars Dangerous?
by troymc on Wednesday October 03, 2012 @01:34PM
(#4608595)
You don't have to use a rover. What about a quadcopter or balloon filled with heated gas?
Re:Are Those Spidery Black Things On Mars Dangerous?
by forgotusername on Wednesday October 03, 2012 @01:39PM
(#4608617)
Good luck.. the highest atmospheric density on Mars is equal to the density found 35 km above the Earth's surface
Re:Are Those Spidery Black Things On Mars Dangerous?
by aidenn0 on Wednesday October 03, 2012 @02:00PM
(#4608743)
I think a latex balloon filled with hydrogen could achieve positive buoyancy. Just bring a little bit of water and you can make your own hydrogen.
Re:Are Those Spidery Black Things On Mars Dangerous?
by debacle on Wednesday October 03, 2012 @02:29PM
(#4608917)
I don't know of many latexes that are springy at -100 C.
Re:Are Those Spidery Black Things On Mars Dangerous?
by aidenn0 on Thursday October 04, 2012 @05:59PM
(#4614627)
Touché. See Camper Bob's response for something that would make more sense.
Re:Are Those Spidery Black Things On Mars Dangerous?
by CamperBob2 on Wednesday October 03, 2012 @07:11PM
(#4610086)
It wouldn't have to be latex. What's wrong with mylar?
Re:Are Those Spidery Black Things On Mars Dangerous?
by mikeash on Wednesday October 03, 2012 @01:56PM
(#4608724)
There is, to a first approximation, no atmosphere on Mars. To a slightly better approximation, there is an atmosphere on Mars, but only enough to cause trouble, not enough to actually be useful for anything.
Re:Are Those Spidery Black Things On Mars Dangerous?
by wtracy on Wednesday October 03, 2012 @02:26PM
(#4608891)
There's enough atmosphere for Nasa to seriously consider deploying airplanes: http://en.wikipedia.org/wiki/Mars_aircraft
Re:Are Those Spidery Black Things On Mars Dangerous?
by stephengillie on Wednesday October 03, 2012 @05:24PM
(#4609728)
We've had the discussion: https://news.ycombinator.com/item?id=4261806
A cessna would need wings as large as a 747 and be traveling about mach 1 to take off, iirc.
Re:Are Those Spidery Black Things On Mars Dangerous?
by skeletonjelly on Wednesday October 03, 2012 @05:55PM
(#4609831)
Thats an awesome metaphor! Going to use this one, thanks.
Re:Are Those Spidery Black Things On Mars Dangerous?
by DiabloD3 on Wednesday October 03, 2012 @06:18PM
(#4609903)
So it would need wings that have ten? times more surface... that doesn't mean this couldn't be done using small scale drone designs.
Re:Are Those Spidery Black Things On Mars Dangerous?
by JonnieCache on Wednesday October 03, 2012 @06:13PM
(#4609887)
Mach 1 where?
Re:Are Those Spidery Black Things On Mars Dangerous?
by goodcanadian on Wednesday October 03, 2012 @07:52PM
(#4610221)
Mach 1 always means the speed of sound in the local environment.
Re:Are Those Spidery Black Things On Mars Dangerous?
by stephengillie on Wednesday October 03, 2012 @07:50PM
(#4610213)
On Mars. Mach, the speed of sound (vibrations), varies with changes in heat, density, etc.
Re:Are Those Spidery Black Things On Mars Dangerous?
by wtracy on Wednesday October 03, 2012 @02:28PM
(#4608905)
On the other hand, the loss of a rover to one of these plumes could itself provide interesting information: It would conclusively prove that they occur explosively, and if we can photograph the rover afterwards then the displacement of an object with known mass would let us gauge the amount of force these things exert.