X-ray background
= X-ray background
{wiki=X-ray_background}
The X-ray background refers to the diffuse and persistent emission of X-rays from various cosmic sources. This background radiation can be classified into several components, primarily stemming from: 1. **Cosmic X-ray Background (CXB)**: This is the cumulative emission of X-rays from numerous unresolved sources such as distant galaxies, active galactic nuclei (AGN), and clusters of galaxies.