Astronauts Armstrong, Collins, and Aldrin were seeing bright flashes of light in the Command Module that weren’t really there. Turned out that the radiation passing through the spacecraft was stimulating their eyes to see bright flashes of light.
One thing I learned was that my statement about "100 trillion neutrinos per second..." was off by a factor of about 1500. According to the article, the actual number is 65 billion per square centimeter per second "in the region of the Earth."
Another thing I learned is that neutrinos carry away more than 100MW of power from a nuclear reactor that is sized to generate 4000MWT. These neutrinos fly out of the reactor core without interacting with anything.
Perhaps the most amazing thing I learned is that it is estimated that 99% of the energy of an exploding supernova is carried off by neutrinos. If anyone is interested in knowing why this is, it would be best to read the article.