[单选题]
A star has absolute lux,e;n i++ (wro.b4ecbwe eu4k m9b gxw5lv a ; fb:hx+s-.i t-kcmg7wl,inosity equal to that of the Sun ($1.5 \times 10^{8} \; km$ from the Earth) but is 10 pc away from the Earth. By what factor will it appear dimmer than the Sun?
A. $2 \times 10^{-9}$
B. $2 \times 10^{-11}$
C. $2 \times 10^{-13}$
D. $2 \times 10^{-15}$
Post time 2024-1-22 00:41:59