An Esa experiment carried out by astronauts on the ISS has found the cosmos is less hostile to space travellers than expected.
It had been thought that cosmic radiation may severely limit the time an astronaut can spend in space without seriously risking their life.
Using a 'phantom' human covered in thousands of detectors, the research showed that levels of radiation had been significantly overestimated - and deep space travel could be fairly safe.
To read more, click here.