Observations: AstronomyCast Ultraviolet Astronomy

Ultraviolet astronomy is generally used to refer to observations of electromagnetic radiation at ultraviolet wavelengths between approximately 10 and 320 nanometres; shorter wavelengths—higher energy photons—are studied by X-ray astronomy and gamma ray astronomy. Light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space. Much of the universe looks cool when being observed with ultraviolet radiation, as it is normally associated with hotter objects; objects hotter than normal stars. Stars that are in wither the early stages or late stages of evolution. The universe is able to be observed with different kinds of radiation x-ray, gamma, etc... Each provides new and valuable insight.