如果在睡前你不得不使用电脑或移动设备，那请将亮度调低以减弱其影响。
If you absolutely must use a computer or mobile device later in the day, at least turn the screen brightness way down to semi-counter the effect of the light.
或者，他们寻找恒星亮度中微小减弱的地方——证明一个行星正在横越或经过从我们的角度所看到的那个恒星。
Or they look for tiny dips in a star's brightness - evidence that a planet is transiting, or passing in front of, the star from our perspective.
在接下来的三年里它减弱到了3.0等，而它最后变回原来的亮度花了超过15年的时间。
It then dwindled to magnitude 3.0 during the next three years, then took more than 15 years to brighten back to normal.
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