Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: OokieWonderslug on 05/12/2012 04:12:20
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We all know that the real color of the sky on Mars is a very pale blue, not pink or red as the liars say. Anyone who has fixed the colors of a NASA Mars pic has seen it. When you correct the colors so the sundial on the rovers is the correct color the sky turns blue. Easy to see.
But what I want to know is why does it have color at all? If you go on Earth to the altitude where air pressure equals Mars air pressure there is no color to the sky. It is black. At a far lower altitude than would equal Mars pressure the sky is black. There should be no color. Yet there it is. Pale blue. I know it is caused by Rayleigh scattering. And that makes skies blue even in a CO2 atmosphere. But how is there enough "air" there to cause any scattering?
And wind forms. How can such thin air cause sand dunes and wind erosion? How can it even hold dust aloft? We have no weather at 100,000ft, which is Mars equivalent air pressure. How can it even hold a cloud? Or make snow?
Are we being lied to about more than the color of the sky? Is it really much thicker than we are being told? Is it all just another method to keep the conspiracy nuts at bay? What's the deal?
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No one? Come on, I am serious here. I need an answer. Why is the sky not black on Mars since the "air" is so thin?
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Which part of the sky ? ...
The general coloring of the Martian surface is a dark yellowish brown ocher, with a sky loaded with dust which appears a yellow ocher tan near the horizon and darkens dramatically toward the zenith
http://www.donaldedavis.com/PARTS/MARSCLRS.html
Towards the horizon you are looking through a greater volume of dust than when looking overhead
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I was talking about directly overhead. The rovers have sent pictures of the sky with clouds from over head and it was "pink". It should be black as coal.
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I would imagine daylight would be like a dusky day on Earth and I would imagine that the cameras are calibrated to be more sensitive because there is less light hitting Mars. Even though it has a smaller atmosphere that Earth, the majority of it would be at ground level where the Rover is. Any photo's would be taken through the majority of this.
I've never seen a photo taken at the zenith from the Rover so can you point me to the link of any?
I'm not sure if these are the correct answers to your questions but I'm no Mars expert. I don't however go in for any conspiracies and I've no doubts we've landed Rovers on Mars and Men on the Moon.