There are two optical telescopes operating at the exact same frequency. The first telescope is a $19$ m telescope that is planned to be located at the L$2$ Lagrangian point $1\mathrm{.}5$ million kilometers past the orbit of Earth. The second telescope is a $2$ m telescope that is planned to be placed on the far side of the moon $($average distance to the moon is $380,000$ km from the Earth$).$ The $19$ m telescope has a greater light gathering power by a factor of $\_\_\_\_\_$ times.