How much radiation do astronauts receive on the ISS?


In 2019, Russian scientists published data on how the electromagnetic field acts on a person and how much radiation an astronaut receives on the ISS. The results obtained once again called into question the American landing on the moon and significantly complicated the planning of controlled flights to the satellite.

The ISS crew absorbs 0.6 millisievert radiation per day. For comparison, these are 5-6 sessions of fluorographic research. On Earth, in one year, an ordinary person receives a dose of 1 mSv of radiation. One year in orbit

In order to stay young and healthy, according to the regulations, the dose of radiation in a lifetime should not exceed 1000 millisieverts. T

The record for the longest stay in orbit belongs to the Russian cosmonaut Gennady Padalka. A total of an astronaut

Where does all this radiation come from? To a greater extent, the source of radiation is the Sun, which continuously emits electromagnetic radiation at all wavelengths. At the same time, flares periodically appear on the Sun — huge explosions, releasing an additional amount of X-rays and gamma rays.

Fortunately, our planet has a magnetic field that forms the magnetosphere — a protective bubble that blocks most of the harmful radiation.

The ISS, orbiting the Earth in a low orbit, partially falls under the protection of the magnetosphere, and therefore the radiation dose at the station is still less than in open unprotected space.

It is curious that the radiation level differs in different compartments of the ship. As a rule, it is less in the inner, not protruding sections.

The magnetic field is another condition that calls into question the feasibility of the US Lunar Program. If on Earth the radiation background consists mainly of gamma radiation, then in space these are charged particles — cosmic rays of ultrahigh energies, which are easily

The daily dose of radiation at a distance of ten radii from the planet is tripled. If we take into account the solar flare, which increases the radiation level by 200-300 times, then a single dose of radiation becomes fatal. Such an astronaut will not live long.

It should also be taken into account that the Earth’s magnetosphere does not absorb solar radiation, but accumulates it around the planet and in the form of radiation belts. Flying through them, the ship absorbs an additional amount of harmful cosmic impact.

The flight to the Moon and back takes 6 days. Theoretically, if you exclude solar flares, a person can stay on a satellite for several months.


Experiments on animals have shown that in outer space they lose the skills of social behavior, become aggressive and experience serious interruptions in the work of internal organs. In other words, no organism will last long in space without the influence of a magnetic field.

Whether the United States was on the moon is still a controversial issue. But what exactly can be said: without serious protection from radiation, a person will not be able to get out into space for a long time, build bases there and fly to distant stars.

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