不论东西方,古代的牧人或农人在天气晴朗的晚上,坐在草原或庭院将观察天象作为一种休闲娱乐,目测星星的亮度。这大概是人类最早对物体明亮度的量测,也可能是光度量测的起源。此外对于阴晴天空的明暗或光线照射屋内的明亮程度,也会进行一些非量化的比较。虽说天文学主要量测的是天体星座的位移(长度)和 Regardless of the East and the West, ancient herdsmen or peasants sit in the grasslands or in the courtyards to observe the sky as a leisure and entertainment spotlighting the brightness of stars. This is probably the earliest human measurement of the brightness of objects, it may be the origin of photometry. In addition, there are some non-quantitative comparisons about the light and shade of a cloudy sky or the brightness of light inside a house. Although astronomy mainly measures the displacement (length) of celestial constellations and