For Alan Stern, the wait is almost over. On July 14, NASA's New Horizons spacecraft, after a journey spanning nearly a decade, will fly past Pluto at 50,000 kilometers per hour, becoming the first spacecraft to make a close approach to this distant world that, for three-quarters of a century, was classified as the ninth planet. The post Q&A with New Horizons Principal Investigator Alan Stern appeared first on SpaceNews.com.