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Science

Wounded Bear

(58,654 posts)

3. Blue skies are due to light diffusion through our predominantly nitrogen atmosphere.

Reply to Deuxcents (Reply #2)

Tue Jul 12, 2022, 08:11 PM

Jul 2022

No a "reflection." Oceans are blue because that is the wavelength of light that penetrates deepest and is reflected back to the surface.

Shallower seas are often green.

In those pictures, the colors are probably enhanced and jiggered to make non-visible light visible to our eyes. Probably how the black of deep space appears blue.

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Highlight:

the Carina Nebula looks like a Christmas Card. [View all] SleeplessinSoCal Jul 2022 OP

It certainly does. Looks like a mountain range. dameatball Jul 2022 #1

Why are the backgrounds blue? Deuxcents Jul 2022 #2

Blue skies are due to light diffusion through our predominantly nitrogen atmosphere. Wounded Bear Jul 2022 #3

That's glowing dust making the picture blue there... hunter Jul 2022 #4

I stand corrected. Thanks... Wounded Bear Jul 2022 #5

Thanks hunter n Wounded Bear.. Deuxcents Jul 2022 #6

Totally agree. SleeplessinSoCal Jul 2022 #7

This is the Christmas Card I was thinking of... SleeplessinSoCal Jul 2022 #8

I keep thinking about the movie 2001: A Space Odyssey.... lastlib Jul 2022 #9

I wonder how vast we thought the universe was in 1968... SleeplessinSoCal Jul 2022 #10

Interesting SCantiGOP Jul 2022 #11