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#1 Re: Unmanned probes » Spirit & Opportunity*4* - continue here » 2004-03-02 15:08:04
So... Salty lake or river...
Dried out...
Leaving lotsa salt behind...
And salt attracts H2O...
So still much scope for brine-like stuff?Or Nevada desert?
Sounds like death valley to me. It has salt deposits at the base, that hold water. Kneel down, and you get a wet salty knee. I can just see some astronaut, trying to brush wet salt off his suit. 
#2 Re: Unmanned probes » Spirit & Opportunity *3* - ...continued from previous threads » 2004-02-04 07:02:30
JasonF,
I agree, I own a reef tank, I could throw a little coral debris around the sand and take a picture just like that. Probably just in our dreams tho.
Link
I have a couple of reef tanks myself. My eyes were definitely drawn to the reef rubble, when I saw that pic.
#3 Re: Unmanned probes » Spirit & Opportunity *3* - ...continued from previous threads » 2004-02-04 02:04:14
I swear those rocks with holes, look just like dead coral.
#4 Re: Unmanned probes » Any Plans For Neptune and Uranus? » 2004-02-03 23:04:43
Anyone know of any concepts or plans for probes out to Uranus and Neptune? I'd love to see something other than just the Pioneer/Voyager flybys. Is the Icy Moons Orbiter a one shot deal, or a first of many ion and fission powered craft?
#5 Re: Science, Technology, and Astronomy » Does Mars have Plate Tectonic Activity? - Does Mars have Plate Tectonic Activity? » 2004-01-27 06:11:46
Thanks Shaun. I had suspected a lot of that information, but never really heard it all brought together. Any probes planned that look at the seismology of Mars? I know we had seismographs on some moon missions, but have hear nothing about Mars.
#6 Re: Science, Technology, and Astronomy » Does Mars have Plate Tectonic Activity? - Does Mars have Plate Tectonic Activity? » 2004-01-27 00:43:53
Some people seem to think that even Earth would have no tectonic plate movement were it not for the fact that the proto-Earth was slammed into by a Mars-size object about 4.5 billion years ago. That collision, which formed the Moon, also stripped away a lot of the thick crust which Earth had accumulated up to that point, leaving the remnant which today is seen as the continental plates. These continental plates are substantially thicker than the oceanic plates and drift around like slag on molten metal.
Now here's a thought. Would life be possible on Earth without that collision? The geochemical cycle plays a big role in the biosphere. Where would we be without it?
#7 Re: Life on Mars » The Weather on Mars - What drives it compared to earth? » 2004-01-26 16:47:30
From what I know about Mars' atmosphere, whenever there's more dust in the air, it gets warmer by soaking up additional heat from the sun, which causes a feedback cycle to kick in...which can lead to a global dust storm.
I wondered if the dust played a role. Thanks.
#8 Re: Life on Mars » The Weather on Mars - What drives it compared to earth? » 2004-01-26 05:47:12
On earth, the oceans and the sun pretty much drive the weather. Smaller things like terrain features and pressure differences handle most of the rest of it. Since you have no oceans on mars, what gives rise to these great dust storms? Some kind of heat engine has to be driving those planet wide storms, but what is it? The sun is the ultimate source, but what does it work through? I did a rough search, but it's not up to someone who should be in bed right now. Good night and I'll leave you with the above questions. Thanks.
#9 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 07:35:24
I did find a picture that might explain the culprit in Spirits malfunction.
And here is the latest from Spirit after rebooting.
#10 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-01-19 22:50:03
Are there any internal layout drawings of the CEV? I'm specifically curious about the capsule concept. How would the seats and cargo sections be arranged? Thanks.
#11 Re: Human missions » Launcher Costs? » 2004-01-15 02:53:10
Thanks. I've mainly been trying to form a mental picture of the economic side. This helps. Astronautix price data is a little out of date, mainly 98 and 99 dollars.
#12 Re: Human missions » Launcher Costs? » 2004-01-14 21:34:29
Is there a breakdown anywhere of the various launchers and costs? I'd like to compare shuttle versus EELV costs, and am having trouble bringing them all together.
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