Are a "Blood moon" and the "Blue marble" compatible?

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Are a "Blood moon" and the "Blue marble" compatible?

Postby nonhocapito on July 26th, 2018, 8:49 am

Question for you science guys. On the 27th we will have "the longest blood moon", as you may have heard. In the country I live in it will be fully visible, at its maximum, for more than an hour. Fun. What strikes me is reading that, during a moon eclipse, the moon will look red because red is the light that scatters through our atmosphere and hits the moon, which otherwise would be in the earth shadow from the sun. Fine. B-but... doesn't it stand to reason then that the glow of the earth as seen from space should always be reddish/brown?? How could the NASA pictures show that nice blue layer around the earth, if the light that escapes the atmosphere is in fact in the red spectrum? (I know that the pictures are fake, only wondering if I am putting my finger on an obvious blunder on part of NASA, or is there another "scientific" explanation for the "blue marble" myth)
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Re: THE "CHATBOX"

Postby patrix on July 28th, 2018, 10:54 am

nonhocapito » July 26th, 2018, 8:49 am wrote:Question for you science guys. On the 27th we will have "the longest blood moon", as you may have heard. In the country I live in it will be fully visible, at its maximum, for more than an hour. Fun. What strikes me is reading that, during a moon eclipse, the moon will look red because red is the light that scatters through our atmosphere and hits the moon, which otherwise would be in the earth shadow from the sun. Fine. B-but... doesn't it stand to reason then that the glow of the earth as seen from space should always be reddish/brown?? How could the NASA pictures show that nice blue layer around the earth, if the light that escapes the atmosphere is in fact in the red spectrum? (I know that the pictures are fake, only wondering if I am putting my finger on an obvious blunder on part of NASA, or is there another "scientific" explanation for the "blue marble" myth)


I put your excellent point on Reddit nonhocapito, and couldn't help give some of my own reflections as well. :) I hope we all do this as much as we can muster. Even if we get mostly hostility back, we show people that these opinions exist and some may even be able to get their rational thinking operational again because of it.

https://www.reddit.com/r/askastronomy/c ... _moon_red/
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Re: Are a "Blood moon" and the "Blue marble" compatible?

Postby nonhocapito on July 31st, 2018, 7:33 am

patrix » 28 Jul 2018, 14:54 wrote:
nonhocapito » July 26th, 2018, 8:49 am wrote:Question for you science guys. On the 27th we will have "the longest blood moon", as you may have heard. In the country I live in it will be fully visible, at its maximum, for more than an hour. Fun. What strikes me is reading that, during a moon eclipse, the moon will look red because red is the light that scatters through our atmosphere and hits the moon, which otherwise would be in the earth shadow from the sun. Fine. B-but... doesn't it stand to reason then that the glow of the earth as seen from space should always be reddish/brown?? How could the NASA pictures show that nice blue layer around the earth, if the light that escapes the atmosphere is in fact in the red spectrum? (I know that the pictures are fake, only wondering if I am putting my finger on an obvious blunder on part of NASA, or is there another "scientific" explanation for the "blue marble" myth)


I put your excellent point on Reddit nonhocapito, and couldn't help give some of my own reflections as well. :) I hope we all do this as much as we can muster. Even if we get mostly hostility back, we show people that these opinions exist and some may even be able to get their rational thinking operational again because of it.

https://www.reddit.com/r/askastronomy/c ... _moon_red/


I made a thread on this, since it seems connected to media fakery...

On that reddit page one person answers:
Why does the Earth not do this from pictures? Pretty much most of them - and especially the Blue Marble famous one - are taken when the sun is shining on it directly. The Earth isn't in anything's shadow so it's just lit up like normal.

This simply isn't true. This person is thinking at the full/composite pictures of earth, but there are now several videos and pictures from the alleged ISS that show earth at night, and when the angle includes the outer layer, it's always blue.

Image

How can the outer layer of the atmosphere in the above picture look blue? The sun rays are going through the atmosphere and scattering in the direction of the observer on the ISS. The observer should be hit by brown/reddish light. Otherwise we would have a blue moon, not a blood moon.

(And anyway, it shouldn't matter whether the earth is in the shadow or not. If the atmosphere captures the blue spectrum, then how can you "see" the blue spectrum from out of it? Or am I misunderstanding the physics here?) (If I am not jerking myself off here, and of course I might just be, the repercussions are incredible. Mars, the "red planet" might then be a "blue" paradise like earth.)
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Re: Are a "Blood moon" and the "Blue marble" compatible?

Postby hoi.polloi on August 1st, 2018, 4:22 pm

Interesting, and we (i.e.; Earth) might be a "Red Dwarf" after all ... ?

That would go along with the "Stellar Metamorphosis" theory suggesting Earth is just a very very old "expired" star. But I don't wish to confuse the issue if that's not what you'd suggest in your logic.

Anyway, your point does seem valid: should atmosphere really appear blue "from space" just because it's blue over long distances within Earth's atmosphere?

Maybe a similar comparison could be made to photography within an ocean vs. photography of (above) the ocean. Within it, things may appear tinted aqua, green, blue, etc. but from above it may appear to be a much different hue based on reflections.

Another interesting factor is that our Sun technically "is green" when tested with spectrometers on Earth. Is this due to atmospheric changes to yellow light or is it really truly giving off a yellow-green within the range of our eyes' bandwidth?

According to this site, no — it really is green in the sense that its bright white visible light peaks green.

solar_spectrum_composite.jpg

solar-spectrum-from-www-mao-kiev-ua--sol_ukr--terskol--bmv_m.jpg
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