• Question: Why are the smaller rock planets nearer the sun and the larger gas planets further from the sun?

    Asked by FootballFred03 to Andrew, Jade, Jessica, Kevin, Lynn on 22 Jun 2015.
    • Photo: Jess Wade

      Jess Wade answered on 22 Jun 2015:

      When the solar system formed a cloud of gas collapsed in on itself and the material started to collide and stick together, forming big clumps that hit in to other clumps and get bigger and bigger. All of the planets form like this, but close to the sun the temperature is so high that the gas planets wouldn’t condense. Only the materials with higher melting points and densities can, and so here the big heavy planets form. The gas gas giants form far enough away from the sun for cool temperatures so the gases can condense to form planets.

    • Photo: Kevin Honeychurch

      Kevin Honeychurch answered on 23 Jun 2015:

      Rocky plants from closer to the sun due sun heat. Furhter out it cold enough for the gas planets to form.