Han Solo can’t use the force. He is not a JEDI.

So maybe he simply denied it because if he can’t use the force why bother believing in it.

No offense, but that's kinda stupid. It would be like saying "I don't know how to play the piano, so I guess I don't believe that pianos exist."

I don't know. If it were possible to travel at the speed of light across our own Milkey Way galaxy, it would take over 150,000 years just to go from one end to the other. Travelling at the speed of a NASA space shuttle would take over 300 million years to make the same trip.

A galaxy is an enormous place!

True, but remember that hyperspace-travel is apparently fast enough to permit travel clear across the galaxy. Remember these lines?

Han: "Kid, I've been from one end of this galaxy to the other."

Imperial Officer (in ESB): "If they went to lightspeed, they could be on the other side of the galaxy by now."