X-ray astronomy is the study of cosmic X-ray sources in the universe. This scientific field has numerous synonyms that describe the same phenomena, such as X-ray astrophysics, X-ray cosmology, and X-ray astronomy research. X-ray astronomy is essential in studying various astronomical objects and phenomena such as supernovas, black holes, and neutron stars. Additionally, X-rays in the universe can help reveal the nature and physical properties of celestial objects. Without X-ray astronomy, we wouldn't have a clear understanding of the universe's basic constituents and the different ways that they interact with each other. Therefore, it is a crucial aspect of modern astronomy and space exploration.