500 days on the surface of Mars
Six months
aboard the ISS
Radiation worker annual exposure limit
One CT scan of the abdomen
Average US person's total annual exposure
Annual background radiation in the US
One whole-mouth dental x-ray
500 days on the surface of Mars is 320 mSv
The average exposure during six months aboard the International Space Station is 80 mSv
A radiation worker's annual exposure limit is 50 mSv
One CT scan of the abdomen is 8 mSv
The average US person's total annual exposure is 6.24 mSv
The average US person's annual background exposure is 3.1 mSv
One whole-mouth dental x-ray is 0.01 mSv
To put that in perspective, click the following options to see how many mSvs each exposes you to:
662 squares represent the amount of radiation a person would be exposed to after
360 days in space on the
way to and from Mars.
1 square represents one millisievert (mSv), a unit of radiation exposure.