• 5-25-2017 Well, you certainly got that first part right!
  • It's not blue, it's black. The reflection of sunlight off of the earth makes the sky appear blue. Note that the "blue" fades to almost white as your gaze moves from vertical to horizontal. This is because there is more reflection from the earths surface. In a vertical view the reflection is only from particulate matter in the atmosphere. The particulates in the air are considerably less dense than the earths surface. When the sunlight is removed, like at night, you see the sky as it really is, black.
  • The atmosphere reflects the blue of the light spectrum from bouncing off into space. This reflection of blue is deeper over the oceans as the waters also reflect blue.
  • It's not as "dumb" as you think as there are a lot of theories around it. No one knows for absolute certainty though.
  • Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

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