Pluto in size of Charon and Pluto has prompted some astronomers to call it a double dwarf planet. The system is also unusual among planetary systems in that each is tidally locked to the other, which means that Pluto and Charon always have the same hemisphere facing each other. From any position on either body, the other is always at the same position in the sky, or always obscured. This also means that the rotation period of each is equal to the time it takes the entire system to rotate around its barycenter. In 2007, observations by the Gemini Observatory of
The Adventures of Pluto Nash Dina suggests that the initials are in fact "MZM", having been seen upside-down by Mona Zimmer. Pluto searches for "MZM" and discovers a criminal called Michael Zoroaster Marucci (Alec Baldwin). Pluto suspects that Michael Marucci and Rex Crater are one and the same. Abruptly, he is contacted by his mother, who tells him that Rowland has been killed by a fellow police officer and the hideout is attacked by Rex Crater's agents. A chase ensues and the heroes escape, but their car is damaged and explodes, causing them to be presumed dead by the agents. They manage to get out