# Light photon direction in movement

I recently watched a couple science videos on YouTube and left me with a doubt.

If a spaceship goes to a really fast speed in the (horizontal) $x$-direction, what would happen if it shoots a light photon perfectly vertical to it, will the horizontal speed of the spaceship affect the direction of the photon being shot or will the photon go straight up?

I'm aware the light's speed doesn't get affected, but what about the direction?

• From whose perspective? – Kyle Kanos Aug 1 '15 at 20:45