brightness variations

基本解释

Repetitive voltage fluctuations cause brightness variations in incandescent elements.
反複的電壓波動引起白熾燈光度的變化。
Imaging the Earth from this distant perspective allows astronomers to connect overall variations in brightness at different wavelengths with planetary features.
從遙遠的眡角拍攝地球，使天文學家能夠把不同波長上的整躰明暗變化與行星的特征地貌聯系在一起。
bbs.astron.ac.cn
In the numbers, they found minute periodic variations in brightness that they believe are caused by the changing phases of its gaseous giant planet, known as CoRoT-1b.
在諸多數據中，研究人員發現了在亮度上存在周期性的細微變化，他們認爲這些變化是由於其巨大的氣態行星不斷變化的相位造成的，該行星叫做CoRoT-1b。
huzhangao.blog.163.com

The technology, which works by measuring brightness variations in your face, does not require special hardware.
ENGADGET
By analyzing measurements of 1207 RR Lyrae stars taken by the Catalina Mount Lemmon Telescope in Tucson, the team was able to observe dramatic brightness variations in these stars, taking place over periods as short as half a day.
FORBES: Astronomers Confirm Milky Way's Most Distant Stellar Stream
Variations in these brightness patterns might reveal the presence of a moon orbiting a planet.
MSN: News editor