whoa. never heard about charonThe rubber guard doesn’t work
All major moons of Jupiter and Saturn show the same face to their parent. Pluto and Charon are even stranger, the two worlds are locked, facing one another for all eternity. Astronomers call this tidal locking, and happens because of the gravitational interaction between worlds.
What is tidal locking?
The moon is tidally locked to the Earth, which means that it always shows one face to our planet. In fact, this is the case for most the large moons in the solar system. What's the process going on to make this happen?phys.org
thats nuts. so:
- center of mass between sun and earth is within the sun
- center of mass between earth and moon is in the earth
BUT
- center of mass between pluto and charon lies in the space between them