why is the sky blue?

[trevorjohnson83]

So everyone says Rayleigh scattering. Other causes: Gravitational blue shift, density of the atmosphere, how much the sun heats the atmosphere. I wonder since the sky is red on planets beyond earth, perhaps the sun is a red star, meaning it's on its oxygen burning stage?

 

[rightwinger]

God wants it that way

 

[1srelluc]

 

[Slade3200]

So everyone says Rayleigh scattering. Other causes: Gravitational blue shift, density of the atmosphere, how much the sun heats the atmosphere. I wonder since the sky is red on planets beyond earth, perhaps the sun is a red star, meaning it's on its oxygen burning stage?

I believe the sky is also blue on mars for part of the day. Depends on the atmosphere and distance light waves travel through it. Blue light is the shorter wavelength and scatters more. The reds and yellows are longer wavelength and cover a greater distance

 

[Votto]

So everyone says Rayleigh scattering. Other causes: Gravitational blue shift, density of the atmosphere, how much the sun heats the atmosphere. I wonder since the sky is red on planets beyond earth, perhaps the sun is a red star, meaning it's on its oxygen burning stage?

I just assumed it was because of all the water, but not sure.

 

[Magnus]

So everyone says Rayleigh scattering. Other causes: Gravitational blue shift, density of the atmosphere, how much the sun heats the atmosphere. I wonder since the sky is red on planets beyond earth, perhaps the sun is a red star, meaning it's on its oxygen burning stage?

 

[Slade3200]

I just assumed it was because of all the water, but not sure.

It’s light waves… what we see is affected by heat, distance atmosphere etc. visually it does seem like it’s just reflecting the ocean water but it’s the opposite. Ocean water is clear. Green maybe with algae. It only looks blue because of the sky

 

[evenflow1969]

So everyone says Rayleigh scattering. Other causes: Gravitational blue shift, density of the atmosphere, how much the sun heats the atmosphere. I wonder since the sky is red on planets beyond earth, perhaps the sun is a red star, meaning it's on its oxygen burning stage?

Gravitational shift is to the red spectrum. The average absorption of energy of the gas in the atmosphere gives it a blue hue.

 

[Dekster]

So everyone says Rayleigh scattering. Other causes: Gravitational blue shift, density of the atmosphere, how much the sun heats the atmosphere. I wonder since the sky is red on planets beyond earth, perhaps the sun is a red star, meaning it's on its oxygen burning stage?

It is every color except blue. What you see is what is reflected away.

 

[saveliberty]

When does the debate on, why are we carbon based life forms start?

 

[Crick]

So everyone says Rayleigh scattering. Other causes

Other causes according to who?

Gravitational blue shift

At any given moment, the Earth and the Sun are extremely close to equilibrium. There is no gravity to cause a shift.

density of the atmosphere

Density can alter the magnitude of other effects but does nothing on its own. It's like saying the color of your dog's hair determines its weight.

how much the sun heats the atmosphere.

The blue of the sky has no temperature dependence.

I wonder since the sky is red on planets beyond earth, perhaps the sun is a red star, meaning it's on its oxygen burning stage?

The Martian sky is reddish from suspended dust. If the sun were in its oxygen burning stage, it would be obvious to us from its spectrum.