The Green Rocket Orb is required to be able to fly your Rocket to Mars. The average speed of the rocket with this orb seems to lie between 0 and 800 km/second, for an average of 400 km/s. That way, it takes about 37.9 hours to travel between Earth and Mars, and 75.8 hours for a full trip. The distance is 54,600,000 km.
Orbs ThreeEmptyOrbs