For most of the second half of the 20th century the value of H 0 {\displaystyle H_{0}} was estimated to be between 50 and 90 (km/s)/Mpc.
在20世紀的後半期，多數的哈伯常數值 H 0 {\displaystyle H_{0}} 都被估計在50和90 (km/s)/Mpc之間。