"Outer planets" refers to the planets in our solar system that are located further away from the Sun than the inner planets. These planets include Jupiter, Saturn, Uranus, and Neptune. Full definition
For our earlier discussion the most significant observation is that the magnetic fields of outer planets can not penetrate to inner solar system due to the influence of solar wind. (judithcurry.com)
These brave women travel the world, tackle global problems, and explore outer planets. (discovermagazine.com)
This could not have occurred here; the outer star pair would have disrupted outer planet formation. (newworldencyclopedia.org)