Answer:
The inner planets—Mercury, Venus, Earth, and Mars—are believed to have been formed by the explosion of supernovas.
Explanation:
The planets in the solar system are of two types, the inner planets, and the outer planets. The planets which are closest to the sun are classified under inner planets. The inner planets are Mercury, Venus, Earth, and Mars. These planets are made up of rocks and metals. They are small in size and denser too.
