Quote from: Stormbringer on 08/20/2014 04:37 amescape velocity from 100 miles up is different from escape velocity from the surface isn't it?True, it is different... it is lower, but only by 2-3% or so.Quotesomething reentering, or a meteor, or even a cosmic rayCosmic ray pushing a bacteria upwards? Surely you jest.
escape velocity from 100 miles up is different from escape velocity from the surface isn't it?
something reentering, or a meteor, or even a cosmic ray
Quote from: gospacex on 08/21/2014 09:39 amQuote from: Stormbringer on 08/20/2014 04:37 amsomething reentering, or a meteor, or even a cosmic rayCosmic ray pushing a bacteria upwards? Surely you jest.not if it directly hits it. but if it churns the air near it's path or creates a channel for one of those high altitude lightning bolts, "sprites" etc...
Quote from: Stormbringer on 08/20/2014 04:37 amsomething reentering, or a meteor, or even a cosmic rayCosmic ray pushing a bacteria upwards? Surely you jest.
Quote from: Stormbringer on 08/21/2014 09:51 amQuote from: gospacex on 08/21/2014 09:39 amQuote from: Stormbringer on 08/20/2014 04:37 amsomething reentering, or a meteor, or even a cosmic rayCosmic ray pushing a bacteria upwards? Surely you jest.not if it directly hits it. but if it churns the air near it's path or creates a channel for one of those high altitude lightning bolts, "sprites" etc...Cosmic ray "churning the air" is ridiculous. You are hit by cosmic rays dozens of times per second. Do you feel any "churning"?You are talking nonsense and clearly know very little about cosmic rays and orbital mechanics.
actually i *AM* aware of the cosmic ray incidence at ground level. i am also aware of my deficiencies in orbital mechanics. furthermore "churning" is more for the other things i mentioned. but cosmic rays do spawn energetic events occasionally. for example antimatter matter reactions up there. again tiny but then so is a spore. another thing is cosmic rays are indicated as a source of not only regular lightning but those odd upper atmosphere events including the variety that shoots upwards
Has anyone considered the significance of ISS venting from the interior of its modules? Many vents for both permanent modules; resupply vehicles have at least pressure relief. Probably my guess is not H2 venting due to Russian electrolysis, (although that could expel H2O along with H2) but the CO2 removal. CO2 removal is probably not perfect; water vapor and air both could be expelled along with CO2. It would still be interesting to know how the microbes got to where they were sampled, however.
A far more likely source of microscopic exterior contamination are water and/or urine vents.
May I suggest another more outlandish theory since this subject is pretty outlandish. Maybe they are not coming from Earth but are out there......
This is silly.. and what are these planton consuming other than x-rays .. HD TV and other dosed of radiation?
Quote from: Herb Schaltegger on 08/22/2014 06:53 pmA far more likely source of microscopic exterior contamination are water and/or urine vents. How about airlock and hatch vestibule depress?
///Note that if you have have a microbe drifting in the atmosphere and suddenly accelerate the ISS orbital velocity, you will have imparted enough energy to vaporize it. If you merely boost it to ISS altitude, it will vaporize on impact. So not only do you have to accelerate your "plankton" to almost exactly ISS orbit, you have to do it gently. Unless your mechanism can specifically select "plankton" you should also see a large quantity of ordinary dust, aerosols etc. lofted by the same mechanism.In any case, there would be a much greater quantity of stuff that is boosted onto trajectories that don't match ISS orbit. All that stuff would effectively be MMOD. We have been doing MMOD exposure experiments for decades. If there was a substantial amount of earth-originated stuff, it would have shown up.
[...]in experiments in different years were found fragments: DNA Mycobacteria as a marker of heterotrophic marine bacterial plankton dwelling in the Barents Sea; DNA extremophilic bacteria Delftria; DNA of bacteria that are similar in their primary structure to the bacteria identified in Madagascar soil samples; Plant DNA genome; Archaea DNA (present in nearly all samples) and DNA of fungi and Erythrobasidium Cystobasidium.[...]According to scientists, this proves the hypothesis about the appearance tropospheric source of living organisms, and suggests the possibility of transfer of the aerosol substance from the troposphere to the height of the ionosphere. Moreover, the results support the hypothesis of the existence of the mechanism "ionospheric elevator" exercising transfer tropospheric aerosol from the surface into the upper ionosphere. This means that the aerosol effect on climate is not limited to the known effects in the troposphere and stratosphere.