Confidence votes 174K. There are three kinds of answers: ones that are mostly right, ones that are mostly wrong, and those that once were right but now are wrong. At the Shuttle's maximum speed of about 30,000 km/hr, it would take more than 16 years to reach Pluto.The New Horizons spacecraft was launched by NASA in 2006 and reached a new record velocity for spacecraft, more than 58,000 km/hr. It was further accelerated by a gravity assist from Jupiter in 2007.onfidence votes 174K. There are three kinds of answers: ones that are mostly right, ones that are mostly wrong, and those that once were right but now are wrong. At the Shuttle's maximum speed of about 30,000 km/hr, it would take more than 16 years to reach Pluto.