Glossary term: Photometry
Description: The term photometry is derived from the Greek phōs meaning light, and metro meaning to measure. Although there are various types of photometry, the basic method involves measuring the intensity of the light (photons) radiated by various astronomical objects. The light from objects passes through specialized filters (known as passbands), and that light is captured on a digital device such as a camera CCD. The passbands cover a range of wavelengths, including infrared, visible and ultraviolet. Astronomical telescopes often have filter groups, which are called photometric systems. Some common systems include UBVRI, JHK, ugriz. Photometry allows different physical characteristics of astronomical objects to be measured, for example, temperature, color, and change in brightness.See this term in other languages
Term and definition status: This term and its definition is still awaiting approval
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