Question

which planet in our solar system is know as the blue planet ?​

Answer 1

Neptune

Neptune: The Blue Planet

Answer 2

$\huge\bold\blue{earth}$

IS CALLED BLUE PALNET.

BECAUSE IF YOU SEE THE EARTH'S PICTURE YOU WILL SEE BLUE THING THOSE IS SEA AND OCEAN. AND GREEN THING ALSO THOSE WERE LAND.