Review: Robert Block on Chasing New Horizons, an update

High resolution close-up image of Ultima Thule returned after the flyby, from the New Horizons Long Range Reconnaissance Imager image site

NASA’s New Horizons spacecraft rang in the New Year on January 1, 2019, by flying past one of the most distant objects in the outer reaches of our solar system: a snowman-shaped space rock the size of Malibu called Ul…