1 Mars â Sometimes called the red planet and the brother of Earth. 2  Mars is the closest planet to the Earth. 3  Jupiter â The largest planet in the Solar System. 4  Saturn â Sixth planet from the Sun.
1 When talking about a general direction, the word is often not capitalised, example: the north side of the house. 2  Place names are capitalised: East Sussex, West Virginia, South Africa.  In other cases, adjectives and nouns normally begin with small letters: Go south for three miles, then go east for another three miles.
Capitalize the Principal Words. The principal words of a title include the first and last words of that title, which you should always capitalize. You should also capitalize all verbs (including infinitives), nouns, pronouns, adjectives, adverbs and some conjunctions. Finally, capitalize every word that is more than three letters long.