There are two major possibilities. One that they formed in...
There are two major possibilities. One that they formed in the innermost, hotter-most regions of our solar system when the sun and planets were forming, and they were thrown out -- all the way out to the Pluto region of the solar system. The other possibility is they were formed around other stars, in hot regions around other stars.
![Don Brownlee Quote About Formed, Hot, Major, Planets, Pluto: There Are Two Major Possibilities...](http://qt.azureedge.net/resources/quotes-images-large/there-are-two-major-possibilities-one-that-they-formed-in-the-innermost-hotter-3d7e40cee921aca571e94773701b1344.jpg)