Should Planet Earth Be Capitalized?

In English, proper nouns (nouns which signify a particular person, place, or thing) are capitalized. Following this rule, when Earth is discussed as a specific planet or celestial body, it is capitalized: It takes six to eight months to travel from Earth to Mars. ... Since it's a proper noun, it is always capitalized.

Does planet have a capital letter?

Like all proper nouns, the names of moons, stars, and planets are written with capital letters. ... (In this example, the word "moon" is a common noun. However, "Ganymede" (the name of that moon) is a proper noun.) The moon orbiting Earth is called The Moon.

Is Earth a planet?

While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal.