Which explanation accounts for where rocky planets formed?

The rocky planets form closer to their star. This is due to the stronger gravitational pull by the star they are orbiting around. Even though they receive more heath, and it seems that they will be the ones that are gassy planets, because they are close to their star, they are orbiting with bigger speed, that makes their surface cool off, and thus create a rocky surface, or can be totally rocky if their core has stopped it's activity. 

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000