天体的距离

其次，引力的强度还取决于天体之间的距离。

Secondly , the strength of gravitation depends on the distance between the bodies .

用解球面三角形的方法，通过两天体的球面距离，求得星位角，从而求得船位的经纬度。

Through the solution , the star position angle can be found with so-called " star distance "( Short for the spherical distance between two stars ) determined So as to have the fix solved .

测量两个天体之间的角距离；类似于八分仪。

An instrument for measuring the angular distance between celestial objects ; resembles an octant .

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。

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

该天体到太阳的轨道距离与地球到太阳的距离几乎一致。

The object 's orbit is virtually the same distance from the sun as is the Earth 's.

装在卫星上的仪器拍摄照片，并测定太空中天体与天体及天体与地球间的距离。

Instruments aboard the satellite take pictures and measure the distance between space objects as well as the distance of the objects from earth .