Not everyone was happy when astrophysicist Neil deGrasse Tyson, host of NOVA scienceNOW on PBS, demoted Pluto’s status as a planet. This letter from Emerson York arrived with a stack of  similar missives written by Mrs. Debbie Dalton’s third-grade class in the Warren L. Miller Elementary School, in Mansfield, Pennsylvania. Note the teary-eyed planets at the bottom.