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happy birthday

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hey uh

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it's not actually my birthday uh though

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happy birthday to the 10 people who are

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watching this whose birthday it actually

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is i bought this balloon this big

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party balloon it's the biggest one that

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they had well at least the only size

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they had actually to illustrate some

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interesting properties of mylar balloons

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viewed with thermal cameras and the

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properties are is that when you're

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looking up at a mylar balloon it's going

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to look hot if you're looking down at a

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mylar balloon it's going to look cold

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and the reason this came up is from this

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this video here the uh rubber duck ufo

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video and there's the suggestion this

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might be a bunch of balloons can have an

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irregular shaped bunch of balloons

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uh it could be something else as well

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but people are saying

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that they think it isn't a bunch of

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balloons because it looks so very cold

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uh it's very bright white and we're in

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black hot mode in this thermal camera so

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people are saying that you know why is

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this so incredibly cold

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and the reason i think is you know what

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i pointed out earlier when you look down

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on a mylar balloon from above then it is

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going to appear cold and why does it do

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that it does that because it's

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reflective and the sky is very very cold

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and so it reflects the sky

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and

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other people have said that it reflects

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other things as well so you'd expect to

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see a mixture of hot and cold but the

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problem is that we're looking at a very

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low resolution video here and we're

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looking down on this this perhaps bunch

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of balloons perhaps a drone or something

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else from a steep angle so the

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reflection we're seeing uh is you know

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we're not actually seeing

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uh very much and the things that are

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reflecting around the sides

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are reflections of the ground which will

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blend in with the ground but this is

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just me talking perhaps i should do some

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kind of experiment to do this so i got

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this balloon got my little thermal

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camera my little flair one camera

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and i went out and did an experiment

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this is in uh black hot mode and we can

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see that we're looking down on it here

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and it's reflecting the sky

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and the sky appears to be to be white to

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be cold

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now if we get down below the balloon and

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we look up at the balloon against the

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sky we see that the balloon appears very

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dark so the balloon when you're looking

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up at it

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appears to be black hot which is hot and

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it shows here 54 degrees and you'll

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notice if i move around and look at

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other areas of the sky

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minus 27 degrees it's looking at this

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blue sky over here which you think of as

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being nice and warm but it's actually 27

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degrees in terms of the radiation coming

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off it that isn't actually the real

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temperature because there's nothing up

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there except for gas you know minus

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minus 40 degrees minus 46 degrees so

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obviously anything you look at against

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the sky even ice actually it's going to

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appear as hot

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it appears black hot against the white

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sky

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so why in the um the rubber duck video

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are we just seeing white you know we're

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looking down

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at this and you saw earlier when i was

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looking down at this balloon

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uh we just we saw this kind of white

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area at the top we see dark as well well

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the reason is we're looking at it down

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at it from quite a

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a high altitude and from a steep angle

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and i tried to simulate that as best as

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i could with what i have available by

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going up on my balcony and looking down

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so here's the balloon there's the

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balloon down here and here's what it

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looks like

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can't see anything else all we're seeing

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is white i can play this here

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and you see the balloon bobbing around

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we don't see anything really other than

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the white blob you know when it's

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adjusted we see just that white blob and

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here i'm measuring the temperature it's

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about 60 degrees i did it this morning

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when we go on to the balloon it goes

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down to a much lower you know below

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freezing temperature which obviously it

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isn't this balloon was actually warmer

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the environment than the environment

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because it's been indoors the whole time

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so it's actually it should actually show

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a warmer if it was showing but because

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it's reflecting the sky

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it just shows up as a white blob and

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that's why this

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uh balloon possible bunch of balloons

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over here

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would show up just as a bunch of white

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blobs and they were blending together

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and they would just show up as bright

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white it's not even super bright white

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you see this white here is the same as

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this white here it's uh you know it's

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the same white here and here it's not

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even particularly cold it's just showing

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up as cold on the thermal video some

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people like dave falcia have tried to

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show

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that it couldn't be a mylar balloon by

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showing these videos over my lab alone

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and they show that it's seen as black

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and white and you can see everything

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clearly uh and then they show it shows

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it up against the sky let's see i think

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this is and this is in black hot mode so

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it appears as hot

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and he's saying that you know this this

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shows that it wouldn't appear

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on the video like that but of course

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here he's looking up at the balloon so

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it's going to appear as hot what he

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should have done is look down at the

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balloon he should have got up on the

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roof of the building and filmed it

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looking down at it the same way that i

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did here

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so you've got to make sure you're doing

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the right type of experiment if you're

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trying to compare like with like

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it's

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all very well just pointing a camera at

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a balloon but if you're pointing at a

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camera at a balloon in a very different

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set of circumstances is not going to

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give you the same result

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here i'm looking down at the balloon and

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we see

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it's very much just a white blob and

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that's what we see

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in the ufo video so it's possible

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that these are actually balloons

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just reflecting the cold of the night

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sky

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and i say reflecting the cold of the

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night sky because this is actually a

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night this is at 0 900 hours of zulu

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time which is gmt so you convert that to

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arizona time that's i think i believe

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two in the morning uh in arizona time uh

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so it's in the middle of the night it's

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dark it's reflecting uh the the night

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sky which i think is even colder than

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the daylight sky and we saw earlier that

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the daylight sky shows as -50 degrees so

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this is going to be reflecting something

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that's very very cold all you're going

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to see is that cold any reflections

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around the edge are just going to be

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reflections of things that are similar

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color to the background so you're not

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even going to see them

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so mylar balloons viewed from above will

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appear as cold view from below will

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appear as hot if you're going to do a