standard candle

At last, to analyze the errors and validate the system on the standard A lamp, we did some tests for the candle flame temperature distribution, and got good result.

最后对火焰温度测量系统进行误差分析，并运用近似黑体的标准A光源对测量系统进行标定，建立了一种温度分段线性拟合的方法，通过实际对蜡烛火焰的测温试验，得到良好的测温结果。

Since the speed of light is constant, knowing how far away such a "standard candle" is ( calculated from its apparent brightness seen from Earth) is to know how long ago it exploded.

再加上光速是恒定的，知道这样一盏“标准蜡烛”离地球多远（根据地球上观测的视觉亮度计算得出）就能知道它是多久以前爆发的。