Twinkie-Little-Star
Although the planets constantly rotate around the sun, Mercury and Venus are the closest planets to one another.
"We're just like Mercury and Venus. We've always been close, with 50,290,000 KM separating us. Telling each other our secrets, our fears, knowing what makes us tick...."
[Angst and just a little heads up, this story won't bring up much facts about the solar system, I just wanted to use Mercury and Venus to compare the main characters' relationship. Also, I don't know if all of the scientific facts that I state in here will be true, so don't go quoting off of me.]