Apparent brightness

The corresponding concept for apparent brightness is generally called a number count .

而视亮度的相应概念通常叫作计数。

Deferring to historical custom , astronomers , measure the apparent brightness of stars through the magnitude scale , a very confusing way .

按照历史习惯，天文学家用星等标这种容易使人混淆的方法来度量恒星的视亮度。

The distance to such an object can be worked out by comparing its apparent brightness with its known , absolute brightness .

通过比较表观亮度和已知的绝对亮度，即可得出该天体和我们的距离。

By gauging the redshift and apparent brightness of a large number of supernovae located at a variety of distances , researchers can create a record of the universe 's expansion .

藉由调校大量位于不同距离的超新星红移和表观亮度，研究人员可造出一组宇宙膨胀的记录。

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。

Let all the apparent darkness hides in brightness and glitters .

把看起来的黑暗，都隐藏在光明与灿烂之中。

Optical flow field is referred to the apparent motion of image brightness patterns . It can be obtained by adding constraints to solve the optical flow constraint equation .

光流场是指图像亮度模式的表观运动，可以通过添加限制条件来求解光流约束方程来获得。