Question

which planet is called blue planet and why

Answer 1

Composition and Structure of the Oceans. Planet Earth has been called the "Blue Planet" due to the abundant water on its surface.

Answer 2

Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water. However, liquid water is a rare commodity in our solar system.