The cosmic microwave background radiation (CMBR) is extremely even, or uniform. This is an extremely unlikely result of an explosion, considering that the radiation has not had time to become homogeneous. 2 This is called the horizon problem. 3
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Calle, C. I. (2009). The Universe: Order Without Design. Amherst, N.Y.: Prometheus Books.
- Calle, 2009, p. 79: “The big bang theory made two very important predictions that were dramatically validated. … And second, it predicted that there should be a background of microwave radiation filling the entire universe today, the relic of the big bang. The measurements of NASA’s COBE satellite spectacularly validated this crucial prediction of the theory.” ↩
- Calle, 2009, p. 79: “However, as mentioned in Chapter 3, COBE also found that the universe is extremely uniform on a large scale, a difficult thing to imagine coming out of an explosion. The problem is a bit more serious, however. The CMB radiation measured by COBE from all directions was not only similar, as was expected, but indistinguishable to the limit of the equipment, with an accuracy of one part in 100,000!” ↩
- Calle, 2009, p. 80: “Nevertheless, the uniformity of the CMB implies that these two points were at the same temperature at 300,000 years. This apparent contradiction is called the horizon problem.” ↩