What colour is the sky on other planets?

In summary, the appearance and composition of a planet's atmosphere is influenced by various factors such as the chemical makeup of the atmosphere, the color and distance of the nearby star, and the depth and density of the atmosphere. These factors can result in different colors and temperatures for a planet's atmosphere, as seen in our own blue, yellow, red, white, or grey atmosphere. The state of the components in the atmosphere, such as droplets, crystals, or dust, also plays a role in its appearance. Overall, the atmosphere of a planet is a complex system that is impacted by multiple variables.
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!Jon Snow!
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I imagine it depends on the chemical makeup of their atmospheres.
 
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!Jon Snow! said:
I imagine it depends on the chemical makeup of their atmospheres.
And the 'color' of the star nearby and the distance to that star, and the depth and density of the planetary atmosphere, which would be functions of the composition and planetary mass (local gravity).

Our atmosphere appears blue, or yellow, or red, or white, or grey depending on time of day, angle of the sun, clouds or clear, dust (particulates) in the air. Our sun is a 'yellow' star, but it could have easily been a red star or blue star, and we would have a different environment, either too cold or too hot. The atmosphere on Venus would look very different.

Edit/update: I'd add temperature of the atmosphere, which be included in the state of the components as mentioned by sophiecentaur.
 
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  • #3
!Jon Snow! said:
I imagine it depends on the chemical makeup of their atmospheres.

And the state of the components (e.g. are there droplets, crystals or dust ) in the atmosphere.
 

1. What determines the color of the sky on other planets?

The color of the sky on other planets is determined by a combination of factors such as the composition of the planet's atmosphere, the size and distance from the planet's star, and the presence of any atmospheric particles or compounds that can absorb or scatter light.

2. Is the sky on other planets always the same color?

No, the color of the sky on other planets can vary greatly depending on the factors mentioned above. For example, the sky on Mars appears reddish due to the presence of iron oxide particles in its atmosphere, while the sky on Uranus appears blue due to the presence of methane gas.

3. Can the color of the sky on other planets change over time?

Yes, the color of the sky on other planets can change over time due to changes in their atmosphere, such as the amount of greenhouse gases or volcanic activity. For example, the sky on Venus was likely much bluer in the past before it underwent a runaway greenhouse effect.

4. Do all planets have a sky?

No, not all planets have a sky as we know it. For example, gas giants like Jupiter and Saturn have thick atmospheres that make it difficult to distinguish between the planet's surface and its sky. Additionally, some planets may not have enough atmospheric particles to create a visible sky.

5. Can the color of the sky on other planets affect the planet's habitability?

Yes, the color of the sky on other planets can have an impact on the planet's habitability. For example, a thick, hazy atmosphere like that of Venus can trap heat and make the planet too hot to support life, while a thinner atmosphere like that of Mars can make the planet too cold. Additionally, the presence of certain compounds in the atmosphere can be toxic to life forms.

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