Why is that the sky is so blue?
Why is the sky blue on Earth?
What's the colour of the earth's sky as seen from the moon? Why the clouds are up in the sky? Why are there clouds? Am I the only one to realize that the sky in winter is a deep blue while the sky in summer is a bluish white color? Why do clouds float in the sky? Why does the sky on the moon appear black during the day? Is the sky purple? Why does the sky appear to be green when there is an impending tornado? What are the reasons why the sky turns green before a tornado? Why is the earth round? Why aeroplanes fly in sky? Is the night sky black or just really dark blue? What would happen if the Moon was blue? Why isn't the Sun orbiting Earth? Why can you sometimes see the sun and the moon in the sky? Why does the sky sometimes appear in red? Why earth revolves around sun? Why is the earth called earth? Why do we see two moons in the sky sometimes? Why does Sun rise in the East? How fair is the sky? Why does the Sun rise from the East? Why can I see both the moon and the sun in the sky? Why does aeroplane fly? Why do many people like the color blue? Why does it appear that the moon and stars move in the sky? If the earth is round, why doesn't one fall off the surface at the South Pole? Is the ISS surrounded by vacuum? If so, how do they see blue skies as seen from Earth? Why does the Sun rise in the East and set in the West? Why don't clouds fall to Earth due to gravity?