The term 'THE PLANETS, E.G.' can be solved by the crossword solutions ORBS (4 letters) and OCTAD (5 letters). ORBS is an acronym for 'Orbiting Regular Bodies of the Solar System' and refers to the eight planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. OCTAD is a term used to describe a group of eight objects or entities. In this case, it is referring to the same eight planets in our solar system.