Comments by "H. de Jong" (@h.dejong2531) on "How do you Protect Spacecraft from the Radiation of Space?" video.

  1. This is the truth: we did go.
    1
  2. Calculate the volume of a cylinder with those measurements, and a cylinder with a diameter of 7.5 m, subtract to get the volume of water. I get 440 tons.
    1
  3. The Apollo missions took 1-2 weeks. A Mars trip takes 6 months. The difference means we could ignore radiation issues for the Moon missions, but can't for missions to Mars.
    1
  4. As usual, you are arguing from a lack of knowledge. Radiation is a problem for months-long missions to e.g. Mars, not a one-week trip to the moon. The van Allen belts are lethal if you put a spacecraft in the center of the belts for a week. The Apollo crews crossed the entire belts in 3 hours.
    1