Here's a particular rebuttal to the claims of Van Allen radiation and other radiation and heat problems (see link for full treatment):
http://www.scribd.com/doc/9797366/Ap...s#outer_page_1
"Challenges and responses
1. The astronauts could not have survived the trip because of exposure to radiation from the Van Allen radiation belt and galactic ambient radiation (see Radiation poisoning). Some hoax theorists have suggested that Starfish Prime (high altitude nuclear testing in 1962) was a failed attempt to disrupt the Van Allen belts.
• The Moon is ten times higher than the Van Allen radiation belts. The spacecraft
moved through the belts in just 30 minutes, and the astronauts were protected
from the ionizing radiation by the aluminium hulls of the spacecraft. In addition,
the orbital transfer trajectory from the Earth to the Moon through the belts was
selected to minimize radiation exposure. Even Dr. James Van Allen, the discoverer
of the Van Allen radiation belts, rebutted the claims that radiation levels were too
dangerous for the Apollo missions.Dosimeters carried by the crews showed they
received about the same cumulative dosage as a chestX-ray or about 1
milligray.[50] Plait cited an average dose of less than 1 rem, which is equivalent to the ambient radiation received by living at sea level for three years.[43], pp. 160–162
• The radiation is actually evidence that the astronauts went to the Moon. Irene
Schneider reports that thirty-three of the thirty-six Apollo astronauts involved in
the nine Apollo missions to leave Earth orbit have early stagecataracts that have
been shown to be caused by radiation exposure to cosmic rays during their
trip.[51] However, only twenty-four astronauts left earth orbit. At least thirty-nine
former astronauts have developed cataracts. Thirty-six of those were involved in
high-radiation missions such as the Apollo lunar missions.[52]
2. Film in the cameras would have been fogged by this radiation.
• The film was kept in metal containers that prevented radiation from fogging the film's emulsion.[43], pp. 162–163 In addition, film carried by unmanned lunar probes such as the Lunar Orbiter and Luna 3 (which used on-board film development processes) was not fogged.
3. The Moon's surface during the daytime is so hot that camera film would have melted.
• There is no atmosphere to efficiently couple lunar surface heat to devices such as
cameras not in direct contact with it. In a vacuum, only radiation remains as a
heat transfer mechanism. The physics of radiative heat transfer are thoroughly
understood, and the proper use of passive optical coatings and paints was
adequate to control the temperature of the film within the cameras; lunar module
temperatures were controlled with similar coatings that gave it its gold color.
Also, while the Moon's surface does get very hot at lunar noon, every Apollo
landing was made shortly after lunar sunrise at the landing site. During the
longer stays, the astronauts did notice increased cooling loads on their spacesuits
as the sun continued to rise and the surface temperature increased, but the effect was easily countered by the passive and active cooling systems.[43], pp. 165–67 The film was not in direct sunlight, so it wasn't overheated.[5 3]
• Note: all of the lunar landings occurred during the lunar daytime. TheMoon' s day is approximately 29½ days long, and as a consequence a single lunar day (dawn to dusk) lasts nearly fifteen days. As such there was no sunrise or sunset while the astronauts were on the surface. Most lunar missions occurred during the first few earth days of the lunar day. 4. The Apollo 16 crew should not have survived a big solar flare firing out when they were on their way to the Moon. "They should have been fried."
• No large solar flare occurred during the flight of Apollo 16. There were large solar flares in August 1972, after Apollo 16 returned to Earth and before the flight of Apollo 17.[54]"