The Earth would say 'I Do' to the Moon and they would Orbit Happily Ever After. A Match Made in the Heavens...
'Great North Road' by Peter F. Hamilton had a planet with a ring around it that was part of a murder mystery. There was a Zone around the equator of the planet that was inhospitable due to stuff from the ring falling to the planet. Don't know how realistic that is, but it sure was interesting.