Question

How much energy is required to accelerate a spaceship with a rest mass of?

Answer 1

Rest mass-energy equivalence is 9 x 10^19 joules per ton. Multiply by 83.5 to get kinetic energy of 7.5 x 10^21 joules.

Don't run into any dust on the way. Hitting a 1 microgram particle would be like a 1.8 kiloton nuclear explosion.