Space flights cause a failure in the immune system of a person
The results of two studies of NASA, recently published in the journal journal of Interferon & Cytokine Research suggest that spaceflight may cause temporary changes in the immune system of crew members who are long time on Board the International Space Station.
Data obtained at an early stage of one of the experiments showed that the distribution of immune cells in the blood of crew members during the flight remained relatively unchanged. However, they found that some cell functions were significantly reduced, while the activity of another cell type, on the contrary, increased. That is, in a sense, the immune system of crew members, it failed.
If the cell activity is suppressed, the immune system cannot adequately react to threats, which can lead to asymptomatic for the virus. If activity is increased, the immune system becomes too sensitive, which can lead to the development of allergic reactions and persistent rashes, as well as reported some of the crew members.
In another study, scientists analyzed blood plasma, measuring the concentration of cytokines – proteins that regulate the immune system. Continue reading
Periodic comet attracted by the Sun, sent to him, but pass due to the same sensitivity to the solar wind, which causes the surrounding cloud of dust and gases blown away from the Sun. People believe that the tiny particles of solar wind will impact more than large particles, but this assumption is wrong. If this were so, then how to explain the continued existence of the Asteroid Belt, which includes debris of any size is not affected, apparently, by the solar wind. The small object may lose velocity faster than the larger object because of differences in gravity, but if they are sensitive to solar wind, it occurs the same effect, – they are repelled equally. The comet, which (eventually) reach the Sun, with a very repeatable trajectory around the Sun, losing a lot of water vapor so that the ratio of substances in their composition is aligned at the expense of pushing away by the solar wind. In short, they lose their cover. They fly up with acceleration from the external space, but at this time do not change direction, going outside, and face (with the Sun). In fact, comets complete their orbits, coming nearer in the process, getting closer and closer to the Sun. Continue reading
Space and Humanity
History of Astronautics – 098
The history of the space a number of times when on the road to further human exploration of outer space rose up high and seemingly insurmountable barriers. In 1961 the transition to weightlessness caused in perfectly healthy astronaut a painful condition similar to motion sickness. In 1966, after a three-week flight on the satellite “Cosmos-110” slightly alive returned to Earth two dogs. In 1970 it became clear that the meeting with Earth after 18-day stay in weightlessness is very difficult for humans. So there was a barrier of reparations, and the possibility of longer flights required further justification. In 1978, after a three-month flight is in the blood of an astronaut found atypical forms of erythrocytes, which suggests the appearance of weightlessness in a new generation of abnormal formed elements. In recent years, in connection with the implementation of the 7-8 series record-month flight appeared ideas about qualitatively new changes in the condition of the body in the postflight period, although not everyone agrees specialists. Continue reading