Respuesta :

ANSWER:

  • About some billion years ago, dust and gas particles began orbiting around the sun.
  • These particles then began to stick together and formed large particles. Slowly, these particles began attracting more mass with their gravity.
  • After millions of years, these particles became planetesimals. They started revolving around the sun in their own orbit and formed spherical shapes.
  • This continued for another millions of years and thus planets were formed.

EXPLANATION:

  • The inner planets are the four planets that are closest to the sun. The inner and outer planets are separated by asteroid belts.
  • The "inner planets are terrestrial" and rocky whereas the "outer planets" are mostly gas.

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