I realize that the Earth has an atmosphere that protects us from solar radiation, but what if we go beyond the atmosphere? I researched that the atmosphere is 300 miles thick and the moon is 238,400 miles away from earth. So would the shuttle, and, if need be, the suits, have lead within them? Also, I know that the atmosphere isn't spherical from the radiation from the sun. So the atmosphere varies in thickness around the earth, but my logic tells me that it doesn't reach all the way to the moon..... Thank you for your time.