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Is the sky bluer when you look straight up at it or from far away?
Answer 1:

The blue color is caused by the air scattering light from the sun - higher energy (bluer) light scatters more than lower energy (redder) light, which is why the sky looks blue and the sun yellowish.

There's also dust in the air which is why sunsets look red or yellow. Because there is less air directly above you than at an angle, the sky above you will usually look darker than the sky just above the horizon.



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