Astro Physics and Space Science

Observational astronomy is one of the classifications of the astronomical science that is related with recording data, in contrast with Theoretical astrophysics, which is mainly concerned with finding out the measurable implications of physical models. It is the practice of observing celestial objects by using telescopes and other astronomical apparatus. Radio astronomy is the branch of Astronomy which studies celestial bodies at Radio Frequencies. Infrared astronomy is the division of astronomy and astrophysics that studies astronomical objects visible in infrared (IR) radiation only. Optical Astronomy is also called as Visible Light Astronomy. Ultraviolet astronomy is the observation of electromagnetic radiation at ultraviolet wavelengths similarly X-ray Astronomy uses X-rays and Gamma ray Astronomy uses Gamma rays

Sky surveys and mappings of the various wavelength bands of electromagnetic radiation have yielded much information on the content and character of the universe's structure. The organization of structure appears to follow as a hierarchical model with organization up to the scale of super clusters and filaments.