内容简介：
The international Astronomical Union says Pluto isn't a planet anymore. Zoe Pope says, better get yourselves a lawyer After a field trip to the planetarium, 9 year-old Zoe Pope learns that Pluto has been demoted to non-planet status. Pluto not a planet? That's like saying grass isn't green. Zoe's crusade to save Pluto's planetary reputation will polarize the town, the country, and maybe even the cosmos