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Mars does have an atmosphere, in fact a fairly substatial one. It's just not as heavy/dense as Earth's.
Originally posted by Tardacus
This is what i see:edit on 11-9-2012 by Tardacus because: (no reason given)
edit on 11-9-2012 by Tardacus because: (no reason given)edit on 11-9-2012 by Tardacus because: (no reason given)
Originally posted by ErroneousDylan
Phage, or anyone else, what do you think about the selection I have highlighted? Does that soil color not seem like damp, nutrient-rich soil where a water channel could have once been? I'm just wondering what exactly could cause the dark coloration of that specific line of soil. I understand it could be from an aerial debris collision but it seems to be isolated specifically in a line-formation.
Originally posted by Phage
reply to post by Larry L
Here's the link explaining to you how the Earth's magnetic field protects us from deadly solar radiation and chaged particles.
Yes. The magnetosphere deflects charged particles but it has no effect on other types of radiation (like gamma). Even if we had no magnetosphere, our atmosphere would protect us from solar particles. Where are those experts saying that the surface would be roasted?
If carbon dating isn't reliable beyond a mere 50,000 years, how can you expect me to take seriously your, or any scientists theory that Mars has be dry for A BILLION YEARS. I'm not even saying that's impossible.
Carbon dating wasn't used, obviously. Why even bring it up? There is other evidence which, if you had bothered to look, you would have known. By the way, I didn't say Mars has been "dry" for a billion years. I said that Gale crater has been. There is evidence for transient liquid water on the surface in other areas more recently.
edit on 9/11/2012 by Phage because: (no reason given)
Originally posted by Larry L
Well.......a wet patch of sand anyway. I don't know if I'd call it "mud" or not, but for the purposes of the thread title, it works well enough.
I was just looking at today's (well, the latest) images from Curiosity, and just from the thumbs, I knew I'd like the pictures. Great angle. From a camera under the chassis, down by the wheels. I thought "oh! great angle for looking for little bugs" or something like this......a nice close view of whatever's there anyway. So I start browsing through them..........no bugs, no fossils, no more fingers blown off ancient statues......awwww......lol.
After disappointment lets loose it's grip I just start skimming through each one again as I always do, just looking for interesting things or geometry and I think "wow, quite a bit of sand is sticking to the wheels. more than I've ever seen in other pics to date" but think nothing more of it. But then I get to the last 2 images from that angle and that "more dirt sticking than normal" turns into very wet sand, to the point where it looks like mud!!
Here's a link to the two images where it's CLEARLY wet. Click on the image to make it more detailed
EDIT- In case it's not clear to you where I'm looking, zoom in to the treads at the very tops of the wheels in the images.
mars.jpl.nasa.gov...
mars.jpl.nasa.gov...
Now, am I just seeing things here? Am I crazy or did that rover just go through a muddy patch of sand? Mind you, it's moving in this series of images. If you look at the 5 or 6 images leading up to this, it seems to be rolling into a gradually more wet area of sand.
Thoughts? A ground spring perhaps? Did it just rain? Am I just crazy?edit on 11-9-2012 by Larry L because: (no reason given)edit on 11-9-2012 by Larry L because: (no reason given)edit on 11-9-2012 by Larry L because: (no reason given)
Originally posted by Phage
reply to post by Larry L
Mars does have an atmosphere, in fact a fairly substatial one. It's just not as heavy/dense as Earth's.
Roughly equivalent at the surface to Earth's atmosphere at something over 100,000 feet. Not exactly substantial. That's why liquid water would not last long.
Originally posted by GoOfYFoOt
I'm no garbage man, but I have to ask. Why, if it is moisture, does it have to be water?
According to the data, the surface of Mars is a bit chilly. Aren't there other gases that could condense to liquid form, that may be more prevalent than H2O?
Originally posted by Larry L
Originally posted by Phage
reply to post by Larry L
Mars does have an atmosphere, in fact a fairly substatial one. It's just not as heavy/dense as Earth's.
Roughly equivalent at the surface to Earth's atmosphere at something over 100,000 feet. Not exactly substantial. That's why liquid water would not last long.
As much as I hate to just keep this going because I've been typing all day (I can't believe how late it is compared to when I started posting again, time FLEW by and it seems I've wasted one whole day of my life in this thread lol), but between all the landers from which we have ground level Martian pictures going back to Viking, I seem to recall some clouds being filmed. A more recent one was from one of the previous rovers which had a series of photos of the horizon over a few minute span, which were taken and strung together into a video/.gif of clouds going by on a clear day.
Now I KNOW you're about to say "show me this as proof", so don't bother. Now that I'm bringing it up, I'm already gonna go look for it because I recall it too clearly for it not to exist................But the only reason I'm actually bringing this up is to ask a question: Do clouds form that high up on Earth? For clouds to form on Mars if it's surface atmosphere density is equivilent to 100,000 feet on Earth........that bar figure for Mars doesn't make much sense to me. Unless clouds form at over 100k here on Earth, then it's believable.edit on 11-9-2012 by Larry L because: (no reason given)
Mars has high, thin clouds of water ice.
"These are the first definitive detections of carbon-dioxide snow clouds," said the report's lead author, Paul Hayne of NASA's Jet Propulsion Laboratory in Pasadena, Calif. "We firmly establish the clouds are composed of carbon dioxide -- flakes of Martian air -- and they are thick enough to result in snowfall accumulation at the surface."