Been saying it for nearly a decade how planets are formed, they are birthed by the sun and then they graze on solar glow (sunshine), and are pelted by trillions of tons of cosmic dust and rocks that fall on planets and moons every day. Over time, like cows grazing on grass, planets and moons fatten up, cities are built on them populations are placed into the cities and after a good run, the cities and populations are destroyed and the cycle continues indefinitely. Planets don't need a "sweet" zone to have cities and populations planted on and inside of them. A planet can be anywhere in the solar system and sustain all kinds of life forms. Many planets escape the star it was born from or is ejected by a huge force when spit out by the sun and ends up out of the solar system and in the darkness of space between star systems. Life is inserted on them planets too. Some of that life humans would do good to keep away from.
For those who think that preposterous and blasphemous against the standardized scientific dogma taught in schools around the world for the last 60 or so years go ahead and read the original article below and be enlightened.