Thank you for the explanation. I initially didnāt understand that what was being disscussed was the moonās brightness, as the original Facebook post didnāt mention it explicitly.
doomcanoe@piefed.social
on 16 Sep 22:23
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Moon light? No... Moon heavy...
TriflingToad@lemmy.world
on 16 Sep 22:43
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moon heavy? noā¦ Moon floatā¦
fartographer@lemmy.world
on 16 Sep 23:04
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Moonlight is also technically sunlight. Itās being reflected by the surface of the moon back onto Earth. If you were on the dark side of the moon while Earth was still visible on that side, I wonder how bright it would be lit up from light reflecting off Earth.
FYI - "dark side of the moon" refers to the far side of the moon (that never faces Earth). Dark here has the same meaning as in dark energy: "unknown."
I have no answer to your actual question, but would also be interested.
floquant@lemmy.dbzer0.com
on 16 Sep 23:21
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The ādarkā side of the moon is a bit of a weird thing, both linguistically and for its tidally locked orbit ^^
The moon revolves around earth at the same speed it revolves around its axis. This ātidal lockingā means that it is always showing the same āfaceā to the Earth, so that it doesnāt appear to be rotating from our perspective.
This doesnāt mean that one side is always dark and the other is exposed to the sun - just that instead of days, the moon has phases! Every time the moon is not full or new, you can see a part of it is illuminated and the other isnāt. So the situation of being āon the dark side of the moonā while the Earth is visible is not possible, but it is possible to only be illuminated by earthlight.
Fun fact, the Moon actually has a very low albedo, meaning itās actually not all that reflective. The surface differs a bit, depending on the composition. But overall itās quite close to a dark asphalt.
Our eyes (or more our brains) are very good at high dynamic range and discerning details. Thatās why a Moon rising may look huge, bright and beautiful. But when you try and take a picture, it looks terrible.
Now this isnāt to say the moon isnāt actually bright when standing upon it. The Moon is at the same distance more or less to the Sun as the Earth and the lack of atmosphere causes the contrast to be higher. We all know standing outside on a bright day will be pretty damned bright. Even when looking at a darker surface like a road, it can be bright out. Thus we wear sunglasses, as did the astronauts, just integrated into their visors. And our eyes adjust to let in less light, as to not blind us.
And our cameras need to be set differently, to prevent the picture from being blown out. Usually automatically, but with fancy or old cameras manually. The astronauts did the same, making it very hard to estimate how bright the surface actually is. If we were to lock our camera on Earth, taking a picture of the bright Moon in the night sky. Then go to the Moonās surface and take another picture with the same settings, the brightness would be the same. However the picture would be a pretty terrible one.
Humans are terrible at estimating things like brightness, because our eyes and brains adjust to the light level. This is required to make us better at seeing the world and thus surviving, but not as good at being scientific measuring devices. Thus weāve used our tools to create actual scientific measuring devices and have mapped the albedo of the Moon. And wouldnāt you know it, itās all perfectly consistent, who would have thought?
This is the thing about all these Facebook conspiracies. They are often based on actual real mismatches. Things that make you go: āHmmm that IS weird!ā. But then instead of doing the research and finding out the answer (which usually takes about 5 mins of searching), they abuse the confusion to promote their bullshit theories. Sometimes it will be just straight up lies, but sometimes itās actually an interesting thing that lies beneath.
Iāve also noticed a lot of them can also be easily defeated when they claim stuff, that it only supports their case if it were always the case. Like for example flat earth because no plane routes that travel between certain places on the southern hemisphere. That would be a strong point for them, except 1 min of googling shows there are actually active plane routes that would be impossible on a flat earth. With live tracking available and people posting on social media getting on and off these planes. Or for example the Earth only being 6000 years old because dino bones are plastic in museums. Sure if all dino bones were plastic, that would be a strong point. But in a lot of cases there are a lot of actual bones. Augmented with plastic to show a full skeleton, where only a partial one was dug up. Which is often plainly stated next to the bones, if those idiots could read of course. Or the skull being hung at the top made from plastic, with the real actual skull in a display next to it, so people can look at it closely.
Flat earth is so dumb, it can be disproven in a billion different ways in very little time. Iām not convinced anyone actually believes that crap. They also do basically nothing to disprove the round(ish) Earth model, they just say itās nonsense because they say it is. And invent crazy dumb shit for their own ātheoriesā that arenāt even internally consistent.
threaded - newest
I think Iām not smart enough to understand this
I think theyāre saying the moon isnāt glowing with the astronauts on it.
But ā¦ itās clearly illuminated
But itās not like a night sun
Neither is the moon
It would be a lot brighter if you opened up the aperture
No itās just not plugged in. Checkmate
they expect it to be as bright as if you stood on one of those LED lights
<img alt="" src="https://lemmy.world/pictrs/image/64fdb356-3769-43b6-8508-76af642c633e.jpeg">
but it looked like grey
Thank you for the explanation. I initially didnāt understand that what was being disscussed was the moonās brightness, as the original Facebook post didnāt mention it explicitly.
Moon light? No... Moon heavy...
moon heavy? noā¦ Moon floatā¦
Moon float? Noā¦ Moon rocksā¦
Moon rocks? No.
.moonwalks
Moon float? Noā¦moon shake.
Cargo space? Noā¦ car go roadā¦
I miss r/flatearth where the comments were like a 5050 if it was satire or genuinely someone from Facebook believing it
Earthlight?
Just regular sunlight. The ānightā sky might throw off your intuition, but no atmosphere = no sky
Moonlight is also technically sunlight. Itās being reflected by the surface of the moon back onto Earth. If you were on the dark side of the moon while Earth was still visible on that side, I wonder how bright it would be lit up from light reflecting off Earth.
Humans never set foot on the dark side, afaik.
FYI - "dark side of the moon" refers to the far side of the moon (that never faces Earth). Dark here has the same meaning as in dark energy: "unknown."
I have no answer to your actual question, but would also be interested.
I know that is also true butā¦ Is there another way to describe the side that isnāt currently facing the sun? š¤
Unilluminated? Night?
The ādarkā side of the moon is a bit of a weird thing, both linguistically and for its tidally locked orbit ^^ The moon revolves around earth at the same speed it revolves around its axis. This ātidal lockingā means that it is always showing the same āfaceā to the Earth, so that it doesnāt appear to be rotating from our perspective.
<img alt="monthly timelapse showing the precession of the moon" src="https://spaceweather.com/swpod2007/02may07/laveder_512.gif">
This doesnāt mean that one side is always dark and the other is exposed to the sun - just that instead of days, the moon has phases! Every time the moon is not full or new, you can see a part of it is illuminated and the other isnāt. So the situation of being āon the dark side of the moonā while the Earth is visible is not possible, but it is possible to only be illuminated by earthlight.
Fun fact, the Moon actually has a very low albedo, meaning itās actually not all that reflective. The surface differs a bit, depending on the composition. But overall itās quite close to a dark asphalt.
Our eyes (or more our brains) are very good at high dynamic range and discerning details. Thatās why a Moon rising may look huge, bright and beautiful. But when you try and take a picture, it looks terrible.
Now this isnāt to say the moon isnāt actually bright when standing upon it. The Moon is at the same distance more or less to the Sun as the Earth and the lack of atmosphere causes the contrast to be higher. We all know standing outside on a bright day will be pretty damned bright. Even when looking at a darker surface like a road, it can be bright out. Thus we wear sunglasses, as did the astronauts, just integrated into their visors. And our eyes adjust to let in less light, as to not blind us.
And our cameras need to be set differently, to prevent the picture from being blown out. Usually automatically, but with fancy or old cameras manually. The astronauts did the same, making it very hard to estimate how bright the surface actually is. If we were to lock our camera on Earth, taking a picture of the bright Moon in the night sky. Then go to the Moonās surface and take another picture with the same settings, the brightness would be the same. However the picture would be a pretty terrible one.
Humans are terrible at estimating things like brightness, because our eyes and brains adjust to the light level. This is required to make us better at seeing the world and thus surviving, but not as good at being scientific measuring devices. Thus weāve used our tools to create actual scientific measuring devices and have mapped the albedo of the Moon. And wouldnāt you know it, itās all perfectly consistent, who would have thought?
This is the thing about all these Facebook conspiracies. They are often based on actual real mismatches. Things that make you go: āHmmm that IS weird!ā. But then instead of doing the research and finding out the answer (which usually takes about 5 mins of searching), they abuse the confusion to promote their bullshit theories. Sometimes it will be just straight up lies, but sometimes itās actually an interesting thing that lies beneath.
Iāve also noticed a lot of them can also be easily defeated when they claim stuff, that it only supports their case if it were always the case. Like for example flat earth because no plane routes that travel between certain places on the southern hemisphere. That would be a strong point for them, except 1 min of googling shows there are actually active plane routes that would be impossible on a flat earth. With live tracking available and people posting on social media getting on and off these planes. Or for example the Earth only being 6000 years old because dino bones are plastic in museums. Sure if all dino bones were plastic, that would be a strong point. But in a lot of cases there are a lot of actual bones. Augmented with plastic to show a full skeleton, where only a partial one was dug up. Which is often plainly stated next to the bones, if those idiots could read of course. Or the skull being hung at the top made from plastic, with the real actual skull in a display next to it, so people can look at it closely.
Flat earth is so dumb, it can be disproven in a billion different ways in very little time. Iām not convinced anyone actually believes that crap. They also do basically nothing to disprove the round(ish) Earth model, they just say itās nonsense because they say it is. And invent crazy dumb shit for their own ātheoriesā that arenāt even internally consistent.
I didnt expect to read about camera exposures and flat earth when I started
Not that you asked, but Iāve been learning to shoot with a fancy camera and here are some pictures of the moon I took.
<img alt="" src="https://lemmy.world/pictrs/image/627e4d94-a59b-4c8e-bc16-c4a9d19f69e8.jpeg"><img alt="" src="https://lemmy.world/pictrs/image/b27ffa14-f15a-49eb-8e0f-dff8c330a194.jpeg"><img alt="" src="https://lemmy.world/pictrs/image/ae77e42c-bd59-40e9-bd8d-91eae44c40eb.jpeg"><img alt="" src="https://lemmy.world/pictrs/image/2c165c46-6742-43e7-b2d5-f500d5b18739.jpeg"><img alt="" src="https://lemmy.world/pictrs/image/a1ab42e4-094b-41d2-92eb-315c86b7c32c.jpeg">
That pic on the moon looks pretty well lit to me.
āhow does the mirror know whatās behind the paper?!ā