出典:Wikipedia
出典:『Wikipedia』 (2011/06/09 17:01 UTC 版)
An astronomical filter is sometimes a telescope accessory used by amateur astronomers to simply enhance the details of celestial objects (much as with amateur photography). By contrast professional astronomers rigorously use filters on telescopes in order to understand the astrophysics (such as stellar classification and placement of a celestial body on its Wein Curve), occurring for the object in a given bandpass via photometry.