‘I’m coming to Hawaii and I’m going to get you.’ Dave Jewitt couldn’t believe his eyes, but that was what it said. It was a threatening email. To an astronomer. You don’t imagine something like that. The name of the sender meant nothing to him, but this unknown American seemed determined to jump on a plane and come over and demand satisfaction. And why? Because his son Billy was so upset by the news that Pluto may no longer be a planet. The enraged parent blamed Jewitt and was out for revenge.