Galaxy M81 from the Ultraviolet Imaging Telescope on Astro-1.
Doctors frequently rely on the results on many tests and procedures to determine a patient's health.
Like doctors, astronomers also need to use a variety of instruments, each sensitive to a different part of the electromagnetic spectrum, to piece together a complete understanding of an astronomical objects nature and physics. This will allow scientists to learn about the chemical composition, temperature and motion of objects that emit large amounts of ultraviolet light because they are so hot. By comparing these types of data, astronomers can learn about the structure and evolution of galaxies.