What Zach found

1. Why Is the Sky Blue? | NASA Space Place – NASA Science for Kids spaceplace.nasa.gov

   Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

2. Why Is the Sky Blue? | NESDIS | National Environmental Satellite, Data, and Information Service nesdis.noaa.gov

   Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light 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.

3. r/explainlikeimfive on Reddit: Eli5: why is the sky blue? reddit.com

   ELI5: air molecules deflect/scatter light sometimes, and the angle that they deflect it at is proportional to the frequency of the light. Blue light is deflected the most, red the least. When you look up at the sky, you're seeing the blue light ...

4. Why is the sky blue? math.ucr.edu

   He showed that the amount of light ... ~= 10. Tyndall and Rayleigh thought that the blue colour of the sky must be due to small particles of dust and droplets of water vapour in the atmosphere....

5. Why is the sky blue? | National Geographic Kids kids.nationalgeographic.com

   When light hits the air molecules in our atmosphere, its colors are scattered in all directions. Blue light is scattered more because of its short, choppy wavelength, making it the color we see the most.

6. Why is the Sky Blue? | Montreal Science Centre montrealsciencecentre.com

   The way the different waves (or colours) of sunlight are dispersed depends on their wavelength. Short wavelengths, like red, are refracted much less than longer wavelengths, like blue, which are refracted much more.

7. Why Is The Sky Blue? weather.gov

   When light bumps into them, some ... by air molecules, violet and blue are scattered most. The sky looks blue, not violet, because our eyes are more sensitive to blue light (and the sun also emits more energy as blue light than as violet)....

8. r/askscience on Reddit: Why is the sky blue? Do I understand it correctly: reddit.com

   Honestly it looked like the eye of sauron in the sky. I wonder what it would take to scatter every last bit of sunlight? ... This is all described via Rayleigh scattering, which states that the amount of scattering light undergoes is inversely proportional to it's wavelength ... Two factors. Sunlight has less purple light in it, and our eyes are less sensitive to purple. So while the fraction of purple photons that get scattered is larger than the fraction of blue photons, the absolute number of blue photons that enter the atmosphere, get scattered, and simulate our eyes to produce the sensation of color are greater than the absolute number of purple photons.

Zach could have used three search operators here and only used one. He is showing restraint.