Pictures on why is the sky blue - qlp

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Hasn't NASA done this before? That ground, though, so sterile. My eyes just want to nuke those rocks and see green sprout somewhere. Not suggesting we do this, just saying.

Add a comment. Active Oldest Votes. This video was made by a "content" company on a monetized YouTube channel. The screenshot is simply a colorized version of a black and white image Note that the notes below the video do not provide the source of the images. Don't trust random monetized channels! Improve this answer. The one from NASA with blue sky also has two-part scatterplots: i.

Though, it seems it's also been manipulated to not-quite-real colors: "The color has been approximately white-balanced to resemble how the scene would appear under daytime lighting conditions on Earth". Plus some noise and clipping. So I'll delete them still viewable in edit history and replace with a simple comparison of a bit of PIA with the screenshot. It's not meant to be convincing by it's own. The key part of the answer is that the black and white image from Obstacle Avoidance Camera B at is the same as the colorized image shown at the beginning of the video.

Thanks for your comment and analysis! Knock yourself out! Show 1 more comment. WhoShock WhoShock 17 2 2 bronze badges. It's all relative. Is it about the wavelengths of light detected or the limitations of the physiology of the human eye? What happens to the violet? Some of the violet light is absorbed by the upper atmosphere. Also, our eyes are not as sensitive to violet as they are to blue. Closer to the horizon, the sky fades to a lighter blue or white. The sunlight reaching us from the horizon has passed through even more air than the sunlight reaching us from overhead.

The molecules of gas have rescattered the blue light in so many directions so many times that less blue light reaches us. As the Sun gets lower in the sky, its light passes through more of the atmosphere to reach you. Even more of the blue and violet light is scattered, allowing the reds and yellows to pass straight through to your eyes without all that competition from the blues. Also, larger particles of dust, pollution, and water vapor in the atmosphere reflect and scatter more of the reds and yellows, sometimes making the whole western sky glow red.

The Short Answer:. 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. All this scattering mixes the colors together again so we see more white and less blue. As the Sun gets lower in the sky, its light is passing through more of the atmosphere to reach you.

Even more of the blue light is scattered, allowing the reds and yellows to pass straight through to your eyes. Sometimes the whole western sky seems to glow. The sky appears red because small particles of dust, pollution, or other aerosols also scatter blue light, leaving more purely red and yellow light to go through the atmosphere.

For example, Mars has a very thin atmosphere made mostly of carbon dioxide and filled with fine dust particles. During the daytime, the Martian sky takes on an orange or reddish color.

But as the Sun sets, the sky around the Sun begins to take on a blue-gray tone. The top image shows the orange-colored Martian sky during the daytime and the bottom image shows the blue-tinted sky at sunset. Our World: Sunsets and Atmospheres. Why Is the Sky Blue? The Short Answer:. Blue light is scattered more than the other colors because it travels as shorter, smaller waves.