Scientists Find Traces of Sea Plankton On ISS Surface 117
schwit1 sends this report from the ITAR-TASS News Agency:
An experiment of taking samples from illuminators and the ISS surface has brought unique results, as scientists had found traces of sea plankton there, the chief of an orbital mission on Russia's ISS segment told reporters. Results of the scope of scientific experiments which had been conducted for a quite long time were summed up in the previous year, confirming that some organisms can live on the surface of the International Space Station for years amid factors of a space flight, such as zero gravity, temperature conditions and hard cosmic radiation. Several surveys proved that these organisms can even develop. He noted that it was not quite clear how these microscopic particles could have appeared on the surface of the space station.
not hard cosmic radiation (Score:4, Informative)
AFAIK, the ISS is still inside the van allen belt which means it isn't even subject to medium-level of cosmic radiation (experienced by the Apollo missions), yet alone hard cosmic interstellar radiation (when you get out into Voyager distances)...
Re:not hard cosmic radiation (Score:4, Informative)
Yes and no-- Depends on what the ISS's orbit is. If it has a circumpolar orbit, (crosses the polar region), then it will pass through the magnetic field lines that funnel cosmic particles into the atmosphere that cause the northern lights. EG-- it would get beamed pretty intensely with concentrated cosmic particles.
If it does not have that kind of orbit, and instead stays around the equator, then no so much. Mostly radiation free, compared to outside the magnetosphere.
ISS orbit track here [isstracker.com]... Quite equatorial...
What we need to do, is send a lander to the moon loaded with some microbial and planktonic colonies, where it can get beamed by high intensity, raw solar wind radiation, (And more importantly, where we can keep close tabs on it easily) and measure how the colonies do over time.
Accidentally did that [nasa.gov] back in '67 with Surveyor 3 [wikipedia.org]...
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. No other life forms were found in soil samples retrieved by the Apollo missions or by two Soviet unmanned sampling missions, although amino acids - not necessarily of biological origin - were found in soil retrieved by the Apollo astronauts.)
Re:This actually makes perfect sense. (Score:4, Informative)
Except water vapor is the gaseous form of water; the plankton would have to be transported on individual molecules of water to reach the ionosphere.
If plankton were transportable in microscopic *droplets* in the troposphere as you suggest, a more plausible explanation is that the equipment was contaminated -- both the station itself and the gear used to test it.
Re:This actually makes perfect sense. (Score:5, Informative)
Actually nothing is loaded into the payload bay in the VAB. That is just where the stack was built up. The ISS payload were installed in the Payload Changeout Room (PCR) on the Rotating Service Structure (RSS) while the shuttle is actually on the Pad. This allows a later integration for the payloads and allows access to them late in the process.
http://www.nasa.gov/mission_pa... [nasa.gov]