That, anyway, is the headline in today's news, regarding the interesting discovery announced by NASA overnight of the planet dubbed Kepler-452b. As I understand it, the properties of the planet are inferred from spectral analysis of its effects on the light from the star which it orbits. However my question is more - well - quotidian. Last week's astronomical news was the fly-by of Pluto (an amazing achievement, I hasten to add) by a craft that had taken nearly ten years to reach its destination. The signals were then taking about 4.5 hours to reach earth; in other words, the craft was 4.5 light-hours away. If such a craft were to travel at the same rate to Kepler-452b, how long would it take to arrive?