[dentist90]

I had to look it up... it was driving me crazy. d= .5 *g * t^2 (like Mike says)

The distance we are allowed to accelerate is roughly 6,000 billion meters. .5g = 5m/s/s
Therefore t^2 = 1200 billion sec^2, square root = 1,095,445 secs.

Thus, it would take approx. 1.1 million secs to travel 1/2 way to Pluto at a constant g acceleration. 1.1 million seconds at 10m/s/s = terminal velocity of 11million m/s... far below the speed of light at 300million m/s.
(Remember earlier that we had calculated that it would take approx 30 million secs to reach the speed of light at g accel. We ran out of dragstrip here before we had to shutdown)