NASA NTRS · 19960003339
Radiation in the universe
Abstract
When Wilhelm Conrad Roentgen discovered radiation one hundred years ago, it seemed that what was discovered was one of the rarest and most volatile members of the family of the basic modules of our natural world. Today cosmologists report that a substantial part of the universe's radiation energy consists of X-rays, which travel through cosmic space with the speed of light.
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Stuhlinger, Ernst, Truemper, Joachim, Weisskopf, Martin. 1992-01-01. Radiation in the universe. https://ntrs.nasa.gov/citations/19960003339
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