Why Earth Is Called Blue Planet?

Earth is an extraordinary planet. From its pristine white caps of snow,green mountain ranges and golden illuminating deserts, it is a true sight to behold. But out of all its phenomenal hues, the colour that stands out the most is blue.

You may have heard the term ‘Blue Planet’ being used to describe our Earth. But why is Earth rightly called ‘the Blue Planet’?

Read on to find out some amazing facts about why Earth is the only planet in our Solar System to be accurately termed ‘Blue Planet’.

Why Earth is called Blue Planet?

Earth is the only planet in our Solar System that is known to harbour life, thus making it special in many aspects. It is called the Blue Planet for its striking blue colour when seen from outer space.

Appearance from outer space

Earth has a significant amount of water spread across the surface. Approximately 71% of the earth’s surface is grouped with water bodies.

This vast amount of water combined with white clouds makes it stand out from other planets from outer space. Moreover, the reflection of sunlight from the surface of water bodies adds a shade of blue colour to the planet, which makes it visible from far away as a giant blue marble.

Gases in Atmosphere

The colour of the skies and features like sunrises and sunsets are also attributed to the gases present in our atmosphere.

The main gases present in our atmosphere are Nitrogen and Oxygen. Out of which Oxygen has a blue colour, thus giving a blue tint to the planet when viewed from outer space.


The planetary variations in the amount of water and atmospheric gases, make this planet a unique place in the universe. With its beautiful blue shade and presence of water, Earth is rightly called the Blue Planet.

Therefore, it serves as a reminder of the importance of conserving the environment on Earth.

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