Question

Planets that are larger in diameter, farther from the sun, and less dense then smaller planets in the solar system

are known as

Answer 1

they are actually known as gas giants. Gas giants are large planets that have more than 10 times the mass of Earth, they are also known as the Jovian or Outer planets . Their compositions are a majority of gases, such as hydrogen, and small amounts of rocky material (mostly at their cores). The four gas giants in our solar system are Jupiter, Saturn, Uranus, and Neptune.

Answer 2

Planets that are larger in diameter, farther from the sun, and less dense then smaller planets in the solar system
are known as giant planets and they are composed of mostly gas like hydrogen gas for example. They are in contradistinction to the terrestrial planets like Mercury Venus Earth and Mars that are solid rock composed of silicate minerals.