as head of the italian space agency in rome physicist roberto bettis done coordinated a project to shield astronauts from cosmic rays. but the problem and the name may start off at all and that's why this problem has never been fully addressed you know this place in for the until now the magnetic field surrounding the earth has kept radiation at an acceptable level they lit it so yes that's nice but sadly. it's our best chance of a lot more but when we go deeper into space the radiation levels there are 3 to 4 times higher than it was so we know that this entails a measurable but still considerable risk of damage this could be a good cancers that can shorten the lives of astronauts returning to earth by 510 or 15 years be cheap at the show queen. civil yet more powerful problem if we wanted to tackle the problem of high energy cosmic rays mechanically we were unfortunately need 3 to 4 metres of absorbent material such as water this is of course absolutely out of the question it would be far too heavy for use in the spaceship but is there any that that's left sort out it. this space radiat