Consider the background radiation coming to an observer from any two opposite sides of the sky. In the context of the cosmic microwave background, the problem can be expressed as follows. On the other hand, such homogeneity and isotropy are difficult to explain because of the “light-horizon” problem. On the one hand, it provides a strong justification for the assumption of homogeneity and isotropy that is common to most cosmological models. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!Īpart from the small fluctuations discussed above (one part in 100,000), the observed cosmic microwave background radiation exhibits a high degree of isotropy, a zeroth order fact that presents both satisfaction and difficulty for a comprehensive theory.Learn about the major environmental problems facing our planet and what can be done about them!
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