venus has plenty of hydrogen. and in my post i also said first that the magnetosphere was crucial, so the rest of my post was taking that assumption -- that they had magnetospheres. I apologize if that wasn't clear.
If you switch Mars and Venus each would have a better shot (if they had better magnetospheres)
Mars would be in more, but couldnt sustain the thick atmosphere of venus. It might be a greenhouse planet, but with a much thinner atmosphere I doubt it.
Venus would be able to hold more of an atmosphere than Mars does, so at Mars orbit it would have a thicker atmosphere and less extreme temperatures. Sure, colder than earth, but not Mars cold.
Well there's multiple scenarios. First, there's the estimated amount of water that would cause the global areological features. Take that number, and subtract the estimated amount of water locked in ice at the poles -- we can estimate this through satellites. The North Pole is mostly water ice, South is mostly dry ice.
Now, that leaves a Heckofalot of water. (A Heckofalot is an official measurement, look it up. It's just short of a Hellofalot) Anyway, that water could be underground...perhaps in shallow aquifers, perhaps quite deep. It's hard to say, we just don't have the tools yet. Then there's the portion that would have been lost. Martian gravity is lower than Earth's, so it couldn't hold as thick an atmosphere as we do. So some water might have just evaporated off the entire planet. Also the Martian magnetic field is quite weak -- perhaps it was stronger before (there is some evidence for that) but when it weakened, it would have allowed solar wind and radiation to rip away the atmosphere and carry water vapor with it.
In short (ha) If we keep digging, we may find none, a little, some or a lot of water.
I used to listen to Tags -- always thought it was better than some of DI's channels -- but the site has been down a LONG time...and I've had unreliable results finding it on shoutcast...sometimes its there, sometimes its not...
It's my concentration music of choice. Non-vocal if I have a difficult problem to solve or a marathon under the gun deadline, vocal if I'm just relaxing. Digitally Imported is the best streaming site on the net. 8)
Yeah I do the movie thing too. But my problem is this: if after 2 hours I'm not satisfied with the movie, I want my money back (or at least wish I hadn't spent it)
With an MMORPG, every one I've played, I'm never satisfied, and always wish I hadn't paid.
It might be more quantity entertainment for $10, but the quality....well, that has never lived up to expectations for me.
No matter what they charge, people will still buy it. Works for drugs, works for MMORPGs. Addiction is a terrible and wonderful thing, depending on who you are.
It's true, possessing clue does make you smarter. I swear I gained 10 IQ points every time I figured out it was Colonel Mustard in the Conservatory with the rope.
Orders of magnitude apart to be sure, but its a slippery slope -- when does evidence become too arcane? where's the line? We make do with what we got, until we can get better information.
http://science.nasa.gov/newhome/headlines/ast01s ep 98_1.htm
Excerpt: The Surveyor probes were the first U.S. spacecraft to land safely on the Moon. In November, 1969, the Surveyor 3 spacecraft's microorganisms were recovered from inside its camera that was brought back to Earth under sterile conditions by the Apollo 12 crew.
The 50-100 organisms survived launch, space vacuum, 3 years of radiation exposure, deep-freeze at an average temperature of only 20 degrees above absolute zero, and no nutrient, water or energy source. (The United States landed 5 Surveyors on the Moon; Surveyor 3 was the only one of the Surveyors visited by any of the six Apollo landings.
And there's history of Christian thinkers wondering about life on other worlds going back to the Middle Ages. Fascinating stuff that isn't studied much.
When you fork out the cash to send out a definitive human expedition to mars that will comprehensively scour the planet for life, looking for your super-proof, then we'll stop. Otherwise, "arcane clues" are all we have to go on. Science works that way. I mean really, you can't see x-rays, just some arcane clues that they are there...but boy, are they there!
1) There has been life found in the upper atmosphere and in the farthest reaches of antarctica.
2) some microbes live IN rocks, some very deep, so the outer layers of rock could protect an atmospheric entry. Especially since rock-loving microbes aren't bothered by extreme temperatures, the center of the rock could still be cool enough not to cook them.
3)Not all rocks, but way more than you'd expect.
4)No argument.
Yes, I believe it could since microbes were discovered on the moon landers after they'd been sitting on the moon for a few years. Also, earth rocks blown off that later re-enter and land have microbes that could survive. There's no event in your scenario that some microbes couldn't survive.
In some other threads that's come up...and we just don't really know. There's no rivers of lava or exploding Tambora event caldera producing eruptions, but are there underground magma rivers? Chambers? Bulges? Just don't have the equipment in place to measure such sensitive seismic data.
Mariner and Viking went through sterilization procedures. The Russian probes...well, no documentation and no real way of knowing if they did or not. So you may have a point. 8)
Is earth vulcanism a good model for mars? I don't know. Different rock composition might make for radically different magma gasses. Are volcanos on Io similar to terran? I don't know...but I bet they're rather different. And of course, vulcanism on Triton is RADICALLY different than terran....so who knows what gasses a Martian volcano would release.
Right! But also, things blown off mars would tend to fall inward towards the sun...just as things blown off earth would. So to really get moving into an orbit that would intersect the martian one, AND then hit Mars....wooo.
But 4 billion years IS a long time. I'd be surprised if we ever found an earth rock on mars, but maybe, just maybe...
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The poster means that traffic accidents most commonly happen 20 minutes after and 20 minutes before the hour.
20 minutes after as everyone is leaving somewhere, and 20 minutes before as everyone is hurrying to get somewhere.
venus has plenty of hydrogen. and in my post i also said first that the magnetosphere was crucial, so the rest of my post was taking that assumption -- that they had magnetospheres. I apologize if that wasn't clear.
If you switch Mars and Venus each would have a better shot (if they had better magnetospheres)
Mars would be in more, but couldnt sustain the thick atmosphere of venus. It might be a greenhouse planet, but with a much thinner atmosphere I doubt it.
Venus would be able to hold more of an atmosphere than Mars does, so at Mars orbit it would have a thicker atmosphere and less extreme temperatures. Sure, colder than earth, but not Mars cold.
Its possible.
Well there's multiple scenarios. First, there's the estimated amount of water that would cause the global areological features. Take that number, and subtract the estimated amount of water locked in ice at the poles -- we can estimate this through satellites. The North Pole is mostly water ice, South is mostly dry ice.
Now, that leaves a Heckofalot of water. (A Heckofalot is an official measurement, look it up. It's just short of a Hellofalot) Anyway, that water could be underground...perhaps in shallow aquifers, perhaps quite deep. It's hard to say, we just don't have the tools yet. Then there's the portion that would have been lost. Martian gravity is lower than Earth's, so it couldn't hold as thick an atmosphere as we do. So some water might have just evaporated off the entire planet. Also the Martian magnetic field is quite weak -- perhaps it was stronger before (there is some evidence for that) but when it weakened, it would have allowed solar wind and radiation to rip away the atmosphere and carry water vapor with it.
In short (ha) If we keep digging, we may find none, a little, some or a lot of water.
I'm surprised they weren't in fear and awe of you, the great wizard Tim. You shoulda just blown them up.
This tech is tailor made for the porn industry. Guaranteed profit, no ??? necessary.
Well I'd be willing to bet there's more than just us ;)
I used to listen to Tags -- always thought it was better than some of DI's channels -- but the site has been down a LONG time...and I've had unreliable results finding it on shoutcast...sometimes its there, sometimes its not...
It's my concentration music of choice. Non-vocal if I have a difficult problem to solve or a marathon under the gun deadline, vocal if I'm just relaxing. Digitally Imported is the best streaming site on the net. 8)
agitating the water will cause ripples. ripples increase surface area, just like the "ripples" on a heatsink, allowing more heat to transfer.
Yeah I do the movie thing too. But my problem is this: if after 2 hours I'm not satisfied with the movie, I want my money back (or at least wish I hadn't spent it)
With an MMORPG, every one I've played, I'm never satisfied, and always wish I hadn't paid.
It might be more quantity entertainment for $10, but the quality....well, that has never lived up to expectations for me.
Arnold Schwarzenegger.
No matter what they charge, people will still buy it. Works for drugs, works for MMORPGs. Addiction is a terrible and wonderful thing, depending on who you are.
It's true, possessing clue does make you smarter. I swear I gained 10 IQ points every time I figured out it was Colonel Mustard in the Conservatory with the rope.
Take that Ms. Peacock!
How do I mod the article post as Troll or Flamebait?
Orders of magnitude apart to be sure, but its a slippery slope -- when does evidence become too arcane? where's the line? We make do with what we got, until we can get better information.
my apologies. I meant "lander" not, Lunar Lander. Still, something that "landed" on the moon had microbes. ;) No offense meant, and none taken.
Lander point is NOT false.
s ep 98_1.htm
http://science.nasa.gov/newhome/headlines/ast01
Excerpt:
The Surveyor probes were the first U.S. spacecraft to land safely on the Moon. In November, 1969, the Surveyor 3 spacecraft's microorganisms were recovered from inside its camera that was brought back to Earth under sterile conditions by the Apollo 12 crew.
The 50-100 organisms survived launch, space vacuum, 3 years of radiation exposure, deep-freeze at an average temperature of only 20 degrees above absolute zero, and no nutrient, water or energy source. (The United States landed 5 Surveyors on the Moon; Surveyor 3 was the only one of the Surveyors visited by any of the six Apollo landings.
And there's history of Christian thinkers wondering about life on other worlds going back to the Middle Ages. Fascinating stuff that isn't studied much.
When you fork out the cash to send out a definitive human expedition to mars that will comprehensively scour the planet for life, looking for your super-proof, then we'll stop. Otherwise, "arcane clues" are all we have to go on. Science works that way. I mean really, you can't see x-rays, just some arcane clues that they are there...but boy, are they there!
1) There has been life found in the upper atmosphere and in the farthest reaches of antarctica.
2) some microbes live IN rocks, some very deep, so the outer layers of rock could protect an atmospheric entry. Especially since rock-loving microbes aren't bothered by extreme temperatures, the center of the rock could still be cool enough not to cook them.
3)Not all rocks, but way more than you'd expect.
4)No argument.
Yes, I believe it could since microbes were discovered on the moon landers after they'd been sitting on the moon for a few years. Also, earth rocks blown off that later re-enter and land have microbes that could survive. There's no event in your scenario that some microbes couldn't survive.
In some other threads that's come up...and we just don't really know. There's no rivers of lava or exploding Tambora event caldera producing eruptions, but are there underground magma rivers? Chambers? Bulges? Just don't have the equipment in place to measure such sensitive seismic data.
Mariner and Viking went through sterilization procedures. The Russian probes...well, no documentation and no real way of knowing if they did or not. So you may have a point. 8)
Is earth vulcanism a good model for mars? I don't know. Different rock composition might make for radically different magma gasses. Are volcanos on Io similar to terran? I don't know...but I bet they're rather different. And of course, vulcanism on Triton is RADICALLY different than terran....so who knows what gasses a Martian volcano would release.
Right! But also, things blown off mars would tend to fall inward towards the sun...just as things blown off earth would. So to really get moving into an orbit that would intersect the martian one, AND then hit Mars....wooo.
But 4 billion years IS a long time. I'd be surprised if we ever found an earth rock on mars, but maybe, just maybe...