[单选题]
It can be shown that the approximate age. u x ctr8h0kl:c9k m slun*-g5lxka m::5aip3 of thzbc -;nt*,b x j3efihxxc h;5)e universe is 1/H, where H is the Hubble constant. Takbj cb;xhz,ftx)hciex -3 ;5n* ing H = 20 km/s/Mly, estimate the age of the universe, in years.
A. 15 thousand years
B. 15 million years
C. 15 billion years
D. 15 trillion years
Post time 2024-1-22 00:41:59