The Urantia Book states, “The interior of your sun is a vast X-ray generator” (p. 460, 41:5.3). And on p. 465 we are told that x rays from the larger suns penetrate all space.
In “The Physics-Astronomy Frontier” by Hoyle and Narlikar we read, “One of the authors remembers how, in the middle 1940’s, the question of whether the Sun might emit x rays was considered by astronomers to be highly speculative.”
The evidence that the sun may emit X rays was the correlation between fade-outs in radio communication and solar flares. These particular fade-outs were caused by the appearance of free electrons in the D layer of the earth’s atmosphere at a height of about 80km which were assumed to be caused by solar radiation capable of ionizing molecules of nitrogen and oxygen at that height — something that light cannot do. The most likely source would be x rays from the sun. It was not until 1948 that x rays from space were detected by Robert Burnright at the U.S. Naval Research Laboratories and shown to be from the sun by Herbert Friedman. Decisive proof that radio fade-outs were caused by solar x rays came with the work of Chubb and Friedman in 1956.
REFERENCES: The Urantia Book, P. 460-461, 465; F. Hoyle and J Narlikar, “The Physics-Astronomy Frontier,” (1980) p. 173. (W.H. Freeman and Co. San Francisco); David H. Clark, “The Cosmos from Space.”
Urantia Evidence 