If you are asked the question “What color is the sky?” I believe you will answere blue. 1 I am afraid you are 2 .The sky has no 3 .When we see blue, we are looking at the blue sunlight.The sunlight shines on the little bits of 4 in the air.
Is the sky 5 of air? I am 6 that you have been asked this question, too.We know that there is air all around the world.We could not live 7 air.Planes could not fly if there is not any air.They need air to 8 their wings.If we go far 9 away from the earth, then we will find there is not any air.
Perhaps we can answer some of questions now.What is the sky? The sky is 10 .
It is all around the world.In 11 space there is nothing 12 the sun, the moon and the stars.
The sky is 13 , seen from the moon.It has no color where there is no 14 in fact.How 15 the universe is!