crazy space

You are an orphan planet.
Millions of years ago, you were peacefully existing in your star system until a supernova explosion suddenly ejected you from it. It took you many years to slow down.

And so, you literally fly into the Solar System. By then, you've already slowed down. And when you flew between Mars and Jupiter, you began to slow down even more, until you stopped altogether.
You flew so close to Jupiter that its gravity affected you.
The sun was shocked when it saw you.

Sun: -It's a new planet!-
Neptune: -New what?-
Jupiter: -I can't believe it...-
Earth: -Wow...-
Mercury: -I think it formed recently...-

You were puzzled to see such a cluster of planets around you.

Sun: -RETURN TO YOUR ORBITS!-

Everyone obediently returned to their orbits, and you remained between Mars and Jupiter.