If there is no atoms/particles in space how is there distance between planets ?

Question: If there is no atoms/particles in space how is there distance between planets ?
- Keywords:
  atoms,
  planets,
  space
Asked by will to Cristina, Gemma, Loan, Michael, Praveen on 9 Nov 2015.
- Cristina Villa del Campo answered on 9 Nov 2015:
  
  Hi Will,
  that is a good question! I wish I knew more physics to give you a better answer. The thing is that the outer space has atoms, what it doesn’t have is air as we have on Earth. Outer space has atoms that are very separated from each other, at a very low density which is called plasma (I had to look that up) and is formed mainly but hydrogen and helium in a very strong vacuum.

Question: If there is no atoms/particles in space how is there distance between planets ?