Blue Planet

Ocean-covered home sphere

Blue Planet refers to Earth, named for its appearance from space—the oceans that cover most of its surface give it a distinctive blue color.

The term emphasizes Earth's uniqueness as a water-rich world: The Blue Planet is the only known planet with liquid water on its surface.

It also titles a landmark BBC nature documentary series about ocean life.

Opposites
planetary identity

Blue PlanetMars

Red planet, war deity

Mercury · Venus · gas giants · Jupiter · Saturn

elemental composition

Blue PlanetMars

Red planet, war deity

rocky planet · gas giant

planetary color/identity

Blue PlanetMars

Red planet, war deity

red giant · brown dwarf · white dwarf

Family

blue, planet, bluer, bluest, bluish, blues, blued, blueing, bluing

Familiarity
Top 500,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Positive · Everyday, not technical · Rated G