I always find it amazing that looking at an object that is just 5 or 6 miles away has more air between you and it then between you and space.

@erdem--

5 жыл бұрын

Wow, you re here too, i love your brain

@Bsing96

5 жыл бұрын

I find it scary 😭

@ais4185

5 жыл бұрын

Granted, as you go up there's considerably less air in terms of mass. In terms of volume, yeah, but that's kinda weird.

@billschlafly4107

5 жыл бұрын

I have decided to believe this without any additional evidence. That says something to me about humanity's willingness to believe stuff base solely on a claim.

@SquareRootOfNegativeOne

5 жыл бұрын

5 or 6? more like 50 or 60....

I am in Calgary, and am incredibly relieved to know that whether one uses the Karman Line or the McDowell line as the demarcation of the space-earth boundary, I am at least three times closer to the warm, inviting expanse of space than I am to the desolate, inhospitable void that is Edmonton.

@sillysausage4549

4 ай бұрын

I've been to Calgary. Flew into there from UK on ski holiday to Banff. I have never seen a more spectacular transition from incredibly boring scenery, to incredibly beautiful.

Nothing is near Adelaide. Can confirm.

@doic342ido9

5 жыл бұрын

The Vili’s Family Bakery is near Adelaide! And oh my...if it weren't! :o

@PaulPaulPaulson

5 жыл бұрын

Perhaps it's "nothing" as in "the vacuum of space" and Adelaide is already above the Karman line 😉

@azdgariarada

5 жыл бұрын

Nothing can tolerate being near the mightiness of the black stump?

@cabbageman

5 жыл бұрын

Kangaroo Island?

@Reactordrone

5 жыл бұрын

I'm closer to Adelaide than I am to space.

Dr. Gray's comments on the value of spaceflight are incredible.

@domvasta

4 жыл бұрын

You can see borders from space, particularly with older countries, they might not match up with the ones on the map anymore, but mountains, rivers, deserts and oceans have separated different peoples from each other for thousands of years and the only countries with the ability to get people to space are on 3 continents, all in the northern hemisphere. Only one nation has it's flag on the moon.

4:20 Got me thinking "plz don't use inches, plz don't use inches!" Yess, lego bricks! Finally a superior unit of length!!!

13:27 - I love the fact that the 3 towers of Lego are shown with increased gap between them as they rise higher up in the "space". The is round and the curvature is shown by that. Such detail. Love it.

Honestly I think I needed to hear Dr Gray's point at 11:50 today more than most other days, thanks doc

"If you want a line, you might as well put it the middle of a region that is well bounded" - My new favourite quote! XD

Who else heard the signal from Contact?

@fredxavier85

5 жыл бұрын

yup, that was great!

@thirtythreeflavors

5 жыл бұрын

I adore you for this comment.

@michaelare

5 жыл бұрын

So unmistakable!

@Recreational_Rick

14 күн бұрын

I thought I was tripping

I think that idea of closeness of space is less unbelievable for people who live at mountains than flatlanders. They know that walking 1 km on is easily done under 10 minutes, but going up 1 km is hard work and takes couple of hours.

Props for including a Canadian reference!

@MmeHyraelle

5 жыл бұрын

When i heard montréal i was like : SAY MY TOWN SAY It. No, opposite way around :p

@charlesdorval394

5 жыл бұрын

Yeah, it was a bit disappointing wasn't it Hey, we still are closer to space than we are from Montreal, I'm fine with that hehehehe

It is really disappointing that this channel is in such a decadence, in plain 2019! I sincerely think that this is the best channel KZread has ever granted, and this is something that we might not find again in some time... Such great and accurate content hardly can be found anywhere else! Having professors and great scientists like them spend their time explaining interesting subjects to the general public for a mere 60 or 70K views is just... Why are people wasting such magnificence! What is going on with the world?

@steveamurray59

4 жыл бұрын

There are a few others, search forth 📡

I've been following this channel since the beginning and it's been interesting to listen to Dr. Gray's accent change over time. I notice she sounds the most Canadian when she's pronouncing numbers and the most English when saying the names of places.

I am blown away by dr. Grays almost superhuman ability to calculate vast distances into lego bricks. A true talent!!

The joy when you see a new Sixty Symbols video is up :)

Humm...very impressed by Prof Gray's presentation skills, clear and concise!!

Visual aids are so incredibly helpful in science- one reason why I like Prof. Merrifield is that the guy always has paper and a sharpie at his side, along with amazing drawing skills!

That subtle bit of the sound from Contact. Very nice touch.

Love videos from Dr. Gray!

That last sentence is so incredibly important. Far too often, people look at things in black and white, and more often than not, I find there's never such straight-forward answers.

It's refreshing to see this poetic yet rationale take on mathematical observations that include many real-world variables rather than just cold, hard semantics of the math in question which is still very impressive in it's own right.

Had no idea how far away GPS satellites are - it's mind blowing to think that it takes a mere bunch of seconds for my phone to sync up with at least 3 of them!!

I can tell right now I'm going to end up linking this video in SO many online arguments!

Oh wow Dr Gray is doing such a great job at delivering a strong message in a compelling way !

Really wel presented -- appreciated Dr Gray

Really cool video! Love the scale and the 3D visualisations to give perspective!

Excellent, as always! Two comments. First, as an aircrew member, I saw the curvature of the Earth in a zoom climb that topped out at 60,000 feet. Second, that is the healthiest Christmas cactus on her window sill that I have ever seen!

I find the definition of the Kármán line to super satisfying and also making a lot of sense.

That's fascinating. When you put it that way then space is a lot closer than it seems or feels. Amazing. Just subscribed.

Great to see you back Dr Gray

excellent presentation. Thanks!

Ah yes. A highly scientific school appropriate video about getting high.

Love all the Star Wars droid sounds on those satellites.

Great visualizations. It's nice to actually see the scale of the numbers.

My favorite astrophysicist is also poetic! Thank you for sharing, Dr. Gray. =)

Man, that really puts the Lunar missions into perspective. Incredible that they pulled that off. Several times even!

I'm terrified by the thought of separating those thin lego blocks

@DirtyPoul

5 жыл бұрын

Use a knife to get in-between the layers and carefully wiggle it a bit. That always worked for me as a child.

@Max_Matrix

5 жыл бұрын

@@DirtyPoul or you could just use a brick separator...

@DirtyPoul

5 жыл бұрын

@@Max_Matrix I never knew those existed. Then I Google it and the first thing that hits me is "Oh, so that's what that weird, orange piece is for!"

@Max_Matrix

5 жыл бұрын

@@DirtyPoul yup, in fact they are going to make teal colored ones soon

@boboften9952

3 жыл бұрын

Call LPL ( Lock Picking Lawyer ) Or Bosain Bill . Tell Them " You Need Lego To Be Picked Open ."

Merciiii pour l’exemple de par chez nous!

This video was awesome. Thanks for sharing :)

Ty for that info. I was curious about this exact thing.

Beautiful Christmas Cactus!

Sound from “Contact” was great👏

Awesome, as usual. Keep it up :)

Thank you for the Canadian reference, really put it in perspective for me!

I like the little throw-in from the movie Contact

Fantastic video! But in the quest for clarifying definitions... ...those are clearly Lego plates and not bricks (for understandable reasons of scale)... :-)

@levicrandall

5 жыл бұрын

Ah. Astute observation. We must keep our terminology clear and precise.

@grigorbrowning

5 жыл бұрын

@@levicrandall Feet to Yards aren't the only distance measures with a factor of three... ;-)

Always fun to hear Meghan's Haligonian accent interspersed with a few words with clear British pronunciation :)

I have always enjoyed Meghan's videos but this one was particularly enlightening. I really hadn't appreciated how varied the heights of the different satellites were.

Great episode. As always, Dr. Gray’s argument is enjoyable to watch. Thank you!

This Alan Eustace skydive record is news to me. When Felix Baumgartner made his jump it was with worldwide coverage and a huge amount of fanfare. Where was the news coverage about the Eustace jump?

I think there's really two different questions to ask when defining this boundary between the atmosphere and outer space. One of them is how high up can you go and still reasonably say you're flying, not orbiting, and that's the Karman line, which sets the highest limit for what you might consider still being in the atmosphere, above which you are definitely in space. The other is how low can you go and still reasonably say you're orbiting, not flying, which is what this new paper tries to establish, which sets the lowest limit for what you might consider still being in space, below which you are definitely in the atmosphere. In between those bounds, whether you're flying or orbiting depends on your speed and shape: if you're moving fast enough that you'll stay up despite how un-aerodynamic your shape is, then you're orbiting, not flying; and if you're not moving that fast and can only stay up if your shape takes mechanical advantage of the atmosphere for lift, then you're flying, not orbiting.

@frankhumbug

5 жыл бұрын

Pfhorrest, what you're saying makes sense, therefore I'm going with what you say....... So do you think it's 80 or 100km?

@Pfhorrest

5 жыл бұрын

@@frankhumbug That depends on how fast you're going and what your shape is.

@frankhumbug

5 жыл бұрын

Pfhorrest, well I don't tend to go that fast (except when I'm crossing the road,) and I'm a little out of shape, so 80?

@jansenonline

5 жыл бұрын

Completely agree, so for space tourism it should be the karman line at 100 km. I wouldnt want to keep explaining that the shape of my vessel didn't give me lift although I'm going almost vertical. Not if I'm paying 200000 euro.

I just quietly, (loudly) fell in love with you guys. Respect! Amazing demonstration. I hope everyone on the planet gets to see this!

I propose the lego brick to become the new international standard for measurement, who's in?

@olfmombach260

5 жыл бұрын

Have fun separating them though lol

@levicrandall

5 жыл бұрын

Seconded!

@The268170

5 жыл бұрын

@olf mombach. They are easy to separate if you follow the 9 steps I lay out in my YT tutorial video. All you need is a razor blade, a vice, and some oil-based lube.

@Skindoggiedog

5 жыл бұрын

Shut up.

@grandpaobvious

5 жыл бұрын

Reference lego brick to be stored in an underground vault in Paris.

14:11 Much love to the editing crew for putting in the transmission sound effect from Contact.

love that contact reference at 14.15 :)) great video overall

Now try pulling these Lego-Blocks apart again... legends say fusion occured between them and they shall never be separated again

"Vega" signal from the movie Contact !!

@Aeshir2

5 жыл бұрын

yeah!!

Well explained

Cool video! I have a question! Does earth's atmosphere experience tides similar to the ocean? Wouldn't that make the height of the Karman line variable?

@danieljensen2626

5 жыл бұрын

Probably. It's also probably fatter at the horizon anyway. Also there's disagreement about where sea level actually is for inland places, so of course that causes disagreement about altitudes above sea level.

@Lexivor

5 жыл бұрын

For the atmosphere the heating of the air by the sun during the day and the cooling at night is much more important than the moon's gravity for tidal effects. When the solar wind is especially active as during sun spot maxima, the extra energy imparted also puffs up the outer layers of the atmosphere.

@MarianneExJohnson

5 жыл бұрын

hombero Without the moon there would still be tides. The sun causes a tidal effect that's about half of the moon's. This is why spring tides and neap tides exist: spring tide is when the effects of the sun and moon reinforce each other, and neap tide is when they (partially) cancel each other. Without the moon, we'd basically have neap tides all the time. Not *no* tides.

Nice comeback with the Adelaide!

Love this video!

Please make a video about the edge of the Universe where all the space ships fall into the abyss when they cross it.

@sokiX1

5 жыл бұрын

Flat universers unite :3

@markmaurer6370

5 жыл бұрын

@@sokiX1 the universe is flat.😜

@passthebutterrobot2600

5 жыл бұрын

The universes is donut-shaped. Homer said so.

@ghuegel

5 жыл бұрын

You can't reach the edge of the universe, NASA agents would shoot you.

@SobeCrunkMonster

5 жыл бұрын

There be dragons

one of the best explanations of how thick the atmosphere is, seen by me on some tele program, was take a basketball, dunk it water, and the thickness of the water when you take it out is about to scale! i really don't remember who the presenter was :/

Thanks you! I’m in Montreal

I think a better title would have been "Where does space begin?".

@veronicagorosito187

4 жыл бұрын

Everywhere!

@veronicagorosito187

4 жыл бұрын

Where matter begins to exist will be a hard one to answer.

"And as always..." 10:10 For a split second I waited for a Vsauce feat hahaha!! BTW, lovely video as always.

Great video

Cheers from Adelaide!

14:!3 Nice touch using the transmissions from Contact as a sound effect.

great video

Yep, nothing near Adelaide, and that's the way we like it 😀

آپ نے بہت اچھی وضاحت کے ساتھ ایک نیا تصوّر سمجھا دیا۔ شکریہ

This could be very important, because hypothetically If you put a space weapon just outside of space then it doesn’t violate the treaty.

That satellite chatter at 2:00 makes me think of playing Deus Ex.

I enjoy the Contact sounds @ 0:13 =)

Isn't the other big political issue not so much the range at which you can launch missiles but the range at which a country's "border" ends going upwards. Ex. A satellite at 100 km above the US/CN/UK/etc. isn't in those countries technically It's in the space above those countries. So no foreign craft is technically infringing on the sovereignty of those nations.

@nodoxplz

5 жыл бұрын

Yes, there is actually an idea floating around the military to transport troops through space so that permission isnt required to transit through a country's airspace

@ForOrAgainstUs

5 жыл бұрын

Also there's military and geopolitical intelligence being gathered all the time. I don't believe the US government/military/intelligence services just sit back and wait for a reason to look at what Russia and China and fundamentalist groups in the middle east are doing. Surely there are definitely areas where they aren't always watching, but I don't think they are ever not watching multiple actors with keen eyes. There's always some type of threat they are keeping an eye on, probably and usually when it's a perceived threat to the US. Being party to restricting their own ability to gather intelligence is not something the US--from its own perceived standing of policeman of the world --would ever do.

@sabin97

4 жыл бұрын

@@ForOrAgainstUs i wonder how they would feel about chinese spy satellites being in space just above usa.....

@fewwiggle

4 жыл бұрын

@@sabin97 There are multiple countries (including China and Russia) that have satellites constantly passing over the USA

@sabin97

4 жыл бұрын

@@fewwiggle could you name one and list a source where i can verify that? i searched but all i found were the names and launch dates....i couldnt find any trajectory....

I heard the signal from Contact in the background on the geosynchronous satellites graphic 14:12.

@jeaguilar

5 жыл бұрын

And at the beginning when first discussing the Karman Line.

@Diggnuts

5 жыл бұрын

They totally did that!

@hirvielain9013

5 жыл бұрын

I've always found that noise very eerie. :S

@TheAngelsHaveThePhoneBox

5 жыл бұрын

And also the imperial probe droid at 1:44 and 2:00.

@DavidLashin

5 жыл бұрын

NoLlama I scanned the comments to see if anyone had noticed that

Great video, I like the mesopause definition since it kind of agrees with the satellite death zone but is more definable

Sample from movie "Contact"? Nice :D

NO EDGEEEEE -hank green

@tatianatub

5 жыл бұрын

dude no edge

14:23 That blew my mind… I always thought geostationary orbit was maybe about a third of _that_ away. Wow.

9:55 The bus passing by in the window when she says she had the ISS overhead, then a person walking by while she remarks about there being people up there.

Brilliant

@06:14 The great gray stump!

Thanks for using the Vega signal from Contact.

The statement "Seeing nothing but the infinity of space" at 11:29 spawned in me the realization that space is indeed endless but our small minds are incapable of discerning that value or non-scalar magnitude.

For some reason I was expecting a video about the edge of the universe but this one was very interesting nonetheless!

"of course you want to go to the moon" @14:40 😂😂

I can only imagine, but I imagine that the three big mind-blowing moments from those "near space or maybe actual space" experiences are: 1) Weightlessness 2) Seeing the curvature of the Earth 3) Seeing the sky be black (or almost black) even though it's during the day And as a bonus I would say, having it all last as long as possible. If your space tourism has those three (+1), I think people will count it and pay for the experience.

The proposed 80km or ~50 miles seems a fair amount considering the papers you read from ( and anton petrov description of it, that already formed an opinion in me ).

❤️ ur explaination 😍

You do see borders from space, not most of them, but definitely some, the border between north and south korea is pretty prominent. You also see how huge the earth is, how many resources there are to exploit, how many forests we have, how huge the ice caps are, how big the ocean is, how much land there is and how little of it we use.

I didn't realize there was even a debate about this. I had always thought that it was 80km. Kind of interesting. I wish I knew what had given me that perception.

11:10 beautifully said

Fantastic video and such a great channel! Timely too. NatGeo just published a video looking at people who, um, fail to accept the shape of earth as outlined and depicted herein. ;) The edge of space, so close and yet so darn hard to get to.

Everyone should be able to see earth at that altitude and be in awe for days.... This can make a change.

@sabin97

4 жыл бұрын

flat earthers will still say it's somehow an illusion.

@veronicagorosito187

4 жыл бұрын

@@sabin97 Oh...absolutely, they could say ''who gave me drugs? this only can be true if being in drugs, i do not believe it anyway''. So, they don't deserve any attention as they are only pathetic trolls that have no possible cure.

@sabin97

4 жыл бұрын

@@veronicagorosito187 i know....but it's funny to see them triggered when presented with facts and science. i put them together with the libertarians, feminists, antivaxers, anti-gmo, creationists and the rest of the looneys....

I suppose that plenty of people in Montréal will be happy that they are closer to space than Ottowa (and vice versa).

11:12 tears 😢

I really love, how foreign (not hungarian) speakers call hungarian scentists. John von Neumann, Theodor von Karman. However Theodor Karman (his hungarian name is Kármán Tódor) was in in fact a noble, but the von title is granted only for german nobles. John Neumann was accurately translated (John in hungarian is János), but he wasn't a noble at all. They were all the victims of the anti-semitism in hungary and had to leave the country.

@pongesz2000

5 жыл бұрын

​@@memberwhen22 don't get me wrong, my comment wasn't negative at all, i did not want to offend any english speaker. i just wanted to share some fun facts about these people. for example Eugene Wigner (Wigner Jenő) has not been called Eugene von Wigner or at least i did not meet with this on the internet (neither have been Edward Teller, nor Leo Szilard)

@bzztbzztboy

5 жыл бұрын

@@pongesz2000 cheers, that's fascinating!

I watch your presentations .. do I don't understand that very much .. but it is very informative .. and you make it so interesting too... being an expert you pull-in as lecturer .. I am just interested in knowing ...about the space and space travel