![]() There are natural historical records available for galactic cosmic rays, such as ice core samples at the poles. The sun by the Atmospheric Imaging Assembly of NASA’s Solar Dynamics Observatory. Anyone who works near sources of radiation has a maximum annual limit on the dose they can safely receive. In extreme circumstances, an acute dose of radiation can cause sickness, burns and organ failure. ![]() Particle radiation can damage DNA in human cells, cause mutations and stimulate cancer. Humans have a limited tolerance to radiation of all kinds. These rays, many of which come from our own Milky Way galaxy, are some of the most energetic particles in the known universe and are found throughout the solar system. This type of radiation, known as “galactic cosmic rays”, consists of the nucleus of an atom travelling very close to the speed of light. But a huge hazard that we sometimes overlook is high energy radiation from sources both inside and outside the solar system.Ī new study, published in the journal Space Weather, has shown that radiation received from outside our solar system has been increasing steadily for the last few years, returning to levels not seen since the first half of the 20th century – making space travel more dangerous today than it was during the Apollo era. From surviving take off to having to rely on oxygen tanks to breathe in orbit, space travel is incredibly risky.
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