Is Moonlight Cold???? 

It's sad that in this day and age, videos like this need to be made.

Good control by also doing this on the same night before moonrise.

If moonlight was cold then using a magnifying glass, like we do with sunlight, should concentrate the light making the target colder. Seems like that’s a big problem for flerfs, too.

For what it's worth, as a Norwegian ("central" Norway, about a six hour/470ish km drive from the Arctic Circle), I can indeed confirm that a clear night (or for that matter, day) is colder than a cloudy night (or day), regardless of the moon beeing up or not, during the winter half of the year.

Solar power -cultists- hobbyists also have measured the output of their solar panels from Moonlight. Moonlight adds power. It doesn't suck electricity from their circuits.

This is something that Flat Earthers and similar people don't seem able to grasp: Cold is not a 'thing' or a 'force' - it is merely the reduction or absence of energy. Similarly, a vacuum is not a 'thing' or a 'force' - it is the absence of matter.

+Electricity goes to oven, -electricity goes to freezer. Electricity is blue and hurts. -Electrician as good as any flerfer is in flerfing

Not to forget. When flerfs measure the moon cooling effect, they place an object in front of the windows and a ref. object next to the windows. All good, but...... they *open the window* to make sure the glass isn't blocking to cooling moon light. What they "forget", it's the flow of colder air from outside that is coolin the object, not the moon. And obviously (I hope) it's warmer indoors than outdoors.

We learnt this in primary school, that you don't get frost under trees or on cloudy nights because the heat is trapped by those objects. It happens whether there is a moon or not.

Great experiment Bob. However, you didn't control for 'nu-uh'. That could be a problem.

We wouldn't need freezers. Just leave your beer outside during the night and bottoms up by breakfast.

Concurrence vs. causality. It's a clear night. It's cold outside. I can see the fullmoon. So the fullmoon causes the cold. Also: Black cat is crossing. A branch is falling down and hits my head. It must be due to the damn cat.

But you're forgetting that moonlight is magic. The glass lets visible light through, but not the magic cooling waves. Or something like that.

You can't cool something by adding energy to it. Period.

Dr. Bob, if moonlight is cooling, then when you point your telescope with its lenses at the Moon and look at it, wouldn't you risk eye frostbite? 🥶 🫡

Aarrgghh! As a trained scientist, I loathe Fahrenheit. He must have been really drunk when he made up that scale. :0)

Nice experiment Bob. Pretty straight-forward experiment.

Like most of us reasonal and practical and factical people, I realised the flerf experiment contained so many flaws and errors I wanted to redo their test, but this one was absolute brilliant. My idea was to use to empty tin cans with a thermometer or a temperature sensor at the bottom of the cans and place them next to each other in the open air and have one pointed to the moon and the other pointing slightly away (no moonshine 🥳) hitting the sensor. This arrangement would give the same temperature reading for both cans, or possible a slightly higher reading for the moon-exposed sensor.

Wonderful work! Thanks for breaking it down with an experiment ❤

Can we just remember that "moonlight" is just reflected sunlight? Flerfs do not even understand this aspect of the heliocentric model.

You know, I haven't heard the "Moonlight is cold" trope from a flatopian in at least three years. I wonder why they seem much more silent about this than they were previously.

What? Flerfs don't know sh!t about Thermodynamics? NEVER lol

from the thumbnail i thought it was a lens to concentrate the light, like how people do it with the sun to melt things but this is also very well done

You can do one more experiment to be really conclusive...blacken the glass except for one small clear patch in the middle...put a thermometer directly underneath the clear patch and others under the blackened out parts and do continuous monitoring

When he cloud is clear on a still night it's colder whether full moon or new moon but that doesn't concern Flat Earthers.

Love the videos brother. Much love and respect from southern indiana sir.

It's amazing, indigenous tribes of Australia, PNG, Africa etc who live in Hot climates, don't have shelters designed to capture "cold Moon light"... They figured out Many different ways to cool shelters, but never involved "cold Moon light"...🤔

Addition to experiment: Normal windows glass has %92 transmittance. For double pane glass it would be less. Maybe you can also take into account this information.

I wish cold light was possible as I have just spent all morning trying to get our blast chillers to work properly, When all I need to do was shine moon light into the room.

I suppose, for the flat earthers, when the moon is up during the day, the weather should be colder?

Dr. Bob, as of now, after TFE was announced, they suddenly do not know what is the sun or how it behaves. So let alone the moon. HAHAHA

Their rebuttal will be that there is a cooling part of the light doesn't pass through glass. Which is an interesting counter argument suggesting moonlight has unknown properties/ radiation. This could be a thing to investigate but they wouldn't provide any experiment to back the claim. A very simple experiment would be with the Ho, null hypothesis now being, "There are cooling elements of moonlight that are reflected off of glass", so having several sheets of glass (definitely not mirrors specifically because they will say mirrors are different to glass... somehow) on angles so as to reflect the light in from the sides

Thank you for your excellent presentation. Unfortunately, the believers in this are too stupid to understand any thing they did not make up.

How dare you do your own research, that goes against everything the "Do your own research" crowd stands for, because it disproves their imaginations.

Part 2 of 3. Flearths could clame that the green pigment could change the moonlight to were it looses its cooling effect.

Even in Summer, cloudy nights tend to be warmer than clear nights. Especially 4 to 6 hours after Sun set.

Ah but can we be sure that the glass does not filter out an invisible cold component in the moonlight?

Thanks BTSG.

let me share this one around, it's about time people need to know about this, not flerfs they'll never get it and nuh-uh the whole thing, but just normal people that would be targeted by the flerfies.

While this experiment is scientifically accurate the window influence will just confuse ferfers. A simpler to understand experiment would be to do the flerfer version twice measuring the temperature in an open area and in an area shaded by trees. Do the experiment once with a full moon and once with no moon on a cloudless night. The shaded area will be warmer whether the moon is visible or not, proving the presence of the moon had no impact on the experiment.

Part 1 of 3. Dr. Bob, Hi. Just a couple of thoughts: 1) Does that glass have a green coloring? Modern glass producers put a green pigment in the glass to make it easier to see. Flerths could clame that the green pigment could change the moonlight moonlight

Just one thing, to make things consistent with what is often preached to flat earthers, please show the date, time and location for the experiment. Also, showing gathered data on a spreadsheet or diagram will make it easier to compare data.

There you go again…confusing those flat Earth people. Confusing them is facts.

There is a "solar panel" technology that used the radiated energy from panels at night to general electricity.

Even for people who live in the sun belt, well east of New Mexico, now night time can be just as hot as the day because of humidity holding all that heat energy at us people level. Same with winter for us, if its humid it feels warmer because some heat is retianed in the ocean of air we exist in.

To me the most convincing experiment would look as follows: 1) We take en equatorial mount which tracks the sky. 2) We put a dovetail on this mount roughly aligning it with the moon. 3) On the one end of this dovetail we put something opaque to create a shadow. (size of it should be sufficient to account for the moon's proper motion during the test time) 4) On the other end we put three identical objects for temperature measurement. Middle should be in the moon's shadow while two other will be illuminated whole time. I bet that all three objects will have the same temperature due to the radiative cooling and due to the fact that the same portion of the sky is blocked. And of course during the sunny day middle object will be significantly cooler wile being in the shade. General scheme: ----------------------> ----------------------> ----------------------> O (Control 1) ----------------------> ||| | ---moonlight--> |||--------O (Test object) ----------------------> ||| | ----------------------> O (Control 2) ----------------------> ----------------------> where "|||" is the object, creating the shadow, and "O" represent three identical bodies for temperature measurement. Crude imitation of a coronograph, so to speak. Most likely to correctly represent my image this comment must be watched via desktop or laptop, not with the phone app.

What's cold is the black sky *_around_* the moon. When flerfers do this "experiment", they always include lots of black sky.

I already know what they are going to say in response: Glass blocks the cooling effects of moonlight.

There was one yo-yo flerfer a few years ago using his WALLET to test cold moonlight! I forgot the dummy’s name.

You should’ve aimed it at the Moon to see what its temperature was!!😂😂😂😂😂😂

Just to educate flerfs: I'd take at least 5 to 10 measurements. In engineering and physics, we'll never take only single measurement if it's a serious measurement. Measurement _always_ contains an error, and taking enough measurements allows one to get min, max, mean and std dev at least, after which is way more easy to find if measurements are good in the first place; for good measurements standard deviation should not be large. Edit: just heard you _did_ several measurments which is great. I was just thinking of That Nathan saying "what do you mean error? This piece of wood is exactly x units long" (I forget what the unit was he used, but obviously he had no idea of what he was talking about -- no measurement is exact!)

Vertcal Bob is the most scientific Bob.

An apparatus ? Old crappy window on two bricks ? Wonder how a homebuild aircraft gona look like !

Hi, Bob. What's wrong with your camera? Why has it fallen on it's side?

Moonlight - nature´s best AC-unit.

I expect the flerfs to blame infra-blue light or whatever they call the cold moonlight not penetrating the glass.. should really test 3 areas, opaque cover, glass cover, and open to the sky, all shielded from any wind chill and seperate to disprove any conduction/convection/radiation theories

I've been moonscorched at least once.

Vertical video syndrome - ARGH!

O, to live in a place where the early evening temps are in the upper 60s. Signed, a person for whom 90 degrees at 11PM is pretty normal.

high school science doesn't exist anymore .... sad

It should be repeatable on a new moon which is what fkerfs fail to check. This approximates that result by doing controls before moonrise.

Some polymers are transparent to thermal radiation. So Flerfs could make a countervideo with a selected plastic window.

Lets go ahead and assume for the moment we're idiots... Cold moonlight is one of the easiest flerf claims to debunk. ANYONE can do ithis experiment, which just goes to show how lazy flerfs are.

Can you end the next video with an excel spread sheet for each stage so we can see the data, because it was a lot of random numbers in locations we could not see and times that could be logged. Also I think a good control would be to have more ground clearance plus a third patch that did not get a covering during the day, allowing the grass to get equal exposure before being covered at night.

Part 3 of 3. 2) It is unclear in your video when you placed the glass on the bricks. If the glass was out there for any leanth of time before sunsets, then the Flerths could clame that the sun shinning through the glass would have heated the ground and air enough to give you bad results. Thanks for the time. Steve

The terminater baby seals made the Ray that makes the cold moonlight!

I assume the next device you're gonna purchase is an infrared camera 😉 Justification for your wife: You can check your house for heat leaks and find damaged components on electronic boards. In addition to debunking flerfs 😉

It can rightfully be argued that the glass pane is a complicating factor due to its characteristics of reflection and absorption/transmission, and by wavelength as well. Here's a far simpler test. Make up a cardboard obstructor of diameter/width approx. 20cm. Support it on the end of a long, thin pole that can place the obstructor about 2m above the object for which the temperature will be measured. With the object sitting on an insulating material that will reduce/eliminate conduction into or from the ground, take temperature readings with and without the obstructor casting its shadow upon the object. The obstructor should block only a quite small area of sky while atvthe same time being large enough to comfortably provide shade from the Moon. The idea is to minimize the blockage against radiative loss into the sky. Indeed, the obstructor need only be moved a relatively small distance until its shadow is clearly removed from the object. Leaving the obstructor otherwise in place removes as a variable any change in sky blockage by it. The object for temperature measurement might best be metallic and thin, so that its temperature can vary as rapidly as possible, thereby reducing hysteresis. Better yet, prepare two that are sufficiently identical, both on an insulating support, and by which simultaneously readings are permitted and hence eliminating hysteresis as a variable. This test protocol should result in no material difference in temperature under direct moonlight or not, revealing the radiative loss into the sky as the operative mechanism. The latter is specifically tested for by varying the solid angle of obstruction of sky. This can be achieved by varying the distance of the one and same obstructor, or by using a series of obstructors kept at a fixed distance, each having a different physical size.

The cold rays clearly reflect off the glass so it’s warmer under the glass 😅😅😅

What if you tested the shadow from a tree, a house and a cloud?

Can’t you just measure the temperature in the shadow of a moonlit fence and in front of the fence to see if there is a difference?

There's a reason he's not Bob the Flat-Earth Guy.

I've listened to a lot of flatearthers over the last few years and I think I've got a feel for how they respond to things like this. So I'm guessing that if they were forced to respond to this they would start off by saying that the glass blocks the magic cold moonlight. They might even think they're smart and call it "anti-infrared" or something like that. They might even agree about heat being given off by the ground in an attempt to sound unbiased, but only if they have another excuse already up their sleeve. If that fails then they'll attack the other equipment, probably the thermometer in this case. And if _that_ fails they'll go after the experimenter themselves, and say they're in on the conspiracy and getting paid by NASA. Sometimes they might even attempt the experiment themselves (in secret of course) and only release their results if they can get the result they want, and it's always funny when they do this because you know they will have made an error during the experiment. It must be tough being a flatearther, I'm betting a lot of them have done numerous experiments that will never see the light of day.

Yes.

Not exactly moonshining to me.....

No

Here's a fun one - if you have an infrared thermometer or (better!) a thermal camera, check the temperature of the blue sky on a crystal clear day. If there's no haze in the way you're likely to measure "out of range" because the sky is always cold. Haze is warmer, like clouds at night. Some folks are making "cold paint" to take advantage of this.

no

it is not totally intuitive concepts. and flat earther isnt know for their great intelle t ans understanding of reality...

Ask them how cold the moon light is and watch as they give you a measurement above absolute zero... making it heat...

Quote from en.wikipedia.org/wiki/Arthur_Eddington "The law that entropy always increases holds, I think, the supreme position among the laws of Nature. If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations - then so much the worse for Maxwell's equations. If it is found to be contradicted by observation - well, these experimentalists do bungle things sometimes. But if your theory is found to be against the Second Law of Thermodynamics I can give you no hope; there is nothing for it to collapse in deepest humiliation.”"

Nice. I'm not sure if anyone has done this. I don't have an accurate ir-therm, otherwise i would've done it. But wouldn't it be good to have an example where the object measured is IN moonlight but under a cover? Compared to an object that is lit by moonlight uncovered, and an object that is in the shade of moon and covered. Just a thought.