If you mean in 5 letters then it is: TODAY
ahead
legal
nasty
grill
medal
towel
Argue is the word :)
The letters 'resdoita' unscramble to spell the word asteroid. An asteroid relates to the solar system.
Large.
"The 5 planets" in the question is wrong. There are 8 known planets, not 5, in our Solar System. The question may mean "5th planet" (from the Sun). Jupiter is the 5th planet.
Common sense is not common - Voltaire