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.
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.
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.
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.
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.
It is really disappointing that this channel is in such a decadence, in plain 2019! I sincerely think that this is the best channel UA-cam 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?
@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.
@Ayanna Mett lower airpressure means the boiling point of a liquid gets lower. When there is no pressure at all any liquid starts to boil. And the temperature in vacuum of space is really cold and one ends up freezing solid
@@mkleist88 - Um, sorry, no. The temperature of a vacuum is *undefined*, and *undefinable*. Temperature is a property of matter, and a vacuum is volume of space that has no matter (worth mentioning) in it. This is why spacecraft that generate (or receive) a lot of heat in the course of their operations have such a hard time staying below their maximum operating temperature, and have to deploy radiative cooling surfaces: In space, the *ONLY* way to dump excess heat is by radiation. You can't rely on just brushing up against some matter (e.g. whisps of gas) that's much cooler than you are (like we do on Earth, constantly): There is *NO MATTER* (to speak of) anywhere near enough to you to either help cool you down, or (annoyingly) warm you up. There is nothing around you that has "a temperature". You have a temperature; You are surrounded by nothingness. The only way you can lose heat is through radiation, which compared to other methods is *SLOW*... =:o\
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.
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!!
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.
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.
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.
Fantastic video! But in the quest for clarifying definitions... ...those are clearly Lego plates and not bricks (for understandable reasons of scale)... :-)
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.
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?
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!
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?
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.
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.
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.
Not necessarily. A shorter cable could hold the satellite in orbit at a slower speed, however it would create significant tension on the tether. The fun calculation is the need for a tether strong enough to hold the weight of itself and the force of the satellite on the end. Of course it would also be interesting if the tether snapped and fell back to earth.
@@MichaelSteeves Nope, any object slower than the rotation of earth that is below the geostationary orbit would fall back to earth. So no tension to the cable. It's counterintuitive, but lower orbits need to be faster than higher ones.
Litigious Society Whilst you can launch stuff from geostationary you would need the cable go much further that geostationary orbit as you need a counterweight, this can be a big rock or a station of some kind.
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.
Maybe I'm an idiot, but I honestly thought this was a video about the size of the universe, as in where the edge of the universe is. I forgot this isn't a space channel.
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.
@@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)
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.
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
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.
@@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....
Fun fact: when Space Shuttles were in service, ISS were at ~350km to take full advantage of the cargo deliveries by Space Shuttles. Now they've raised to ~400km to improve fuel economy by making less adjustments (due to atmosphere drag)
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 :/
Improperly titled. Space is everywhere in the universe. Where is outer space would be the threshold between space on Earth and everywhere else, which is the question being asked in this video!
@@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.
@@VeronicaGorositoMusic 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....
That's a lot better than the posited 9:38 "revisited/refined" ideas. Karman's definition has to do with orbit, the Saturn launches parked at ~105mi/170km but even with their relatively clean aerodynamic profile (compared to solar cell wings) its orbit was considered a minimum. "Dipping way into the atmosphere" 1:53 , like they don't have apogee at who knows, hundreds of km. The atmospheric layers type is the only redeeming model in this clip, IMO.
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.
Please let's keep it at 100 km. I like it there. I don't want it lowered. The edge of our atmosphere should be up there at a high enough number that you can experience weightlessness and clearly see earth's curvature. I like space.
Never thought about this stuff. Human brain wants a concrete category to simplify the world and make it easier to understand, but the sharp edge is simply not there.
Science is ALWAYS daring the next generation of scientists to "cross this line"....the Karman Line is just the most recent.....I love it!!!! Tally Ho and onward, young scientists!
I wish you would have done this with a globe instead of a partial map of the earth. I think a globe would have helped people better understand the relatively small distances involved.
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
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.
I would like to think the aeronautical and astronautical folks can leave the Karman line where it is, and make definitional terms that are discrete. We demarcate "fuzzy boundaries", to some extent, with sunlight: civil, nautical and astronomical twilight. It wouldn't be hard to use extant rules-of-thumb to make lines or zones. Civil atmosphere could be a line below which air travel for common human purposes is possible. Astronautical atmosphere could be the the boundary in which atmospheric effects still hold with a significant factor for orbit calculations, etc.
Forgive me if someone has already done this but I remember reading that in proportion, the atmosphere of the earth is thinner than the skin of an apple :)
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.
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.
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.
Wow, you re here too, i love your brain
I find it scary 😭
Granted, as you go up there's considerably less air in terms of mass. In terms of volume, yeah, but that's kinda weird.
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.
5 or 6? more like 50 or 60....
Nothing is near Adelaide. Can confirm.
The Vili’s Family Bakery is near Adelaide! And oh my...if it weren't! :o
Perhaps it's "nothing" as in "the vacuum of space" and Adelaide is already above the Karman line 😉
Nothing can tolerate being near the mightiness of the black stump?
Kangaroo Island?
I'm closer to Adelaide than I am to space.
Dr. Gray's comments on the value of spaceflight are incredible.
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.
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.
It is really disappointing that this channel is in such a decadence, in plain 2019!
I sincerely think that this is the best channel UA-cam 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?
There are a few others, search forth 📡
Who else heard the signal from Contact?
yup, that was great!
I adore you for this comment.
So unmistakable!
I thought I was tripping
Noone.
Honestly I think I needed to hear Dr Gray's point at 11:50 today more than most other days, thanks doc
I am blown away by dr. Grays almost superhuman ability to calculate vast distances into lego bricks. A true talent!!
I propose the lego brick to become the new international standard for measurement, who's in?
Have fun separating them though lol
@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.
Shut up.
Reference lego brick to be stored in an underground vault in Paris.
Better than imperial units, for sure
You can say Heaven is closer to Earth than you might think.
Sure, if in heaven you suffocate in a vacuum while your blood boils and your cells rupture before you freeze solid. That sounds simply divine.
@Ayanna Mett lower airpressure means the boiling point of a liquid gets lower. When there is no pressure at all any liquid starts to boil. And the temperature in vacuum of space is really cold and one ends up freezing solid
@@mkleist88 - Um, sorry, no. The temperature of a vacuum is *undefined*, and *undefinable*. Temperature is a property of matter, and a vacuum is volume of space that has no matter (worth mentioning) in it.
This is why spacecraft that generate (or receive) a lot of heat in the course of their operations have such a hard time staying below their maximum operating temperature, and have to deploy radiative cooling surfaces: In space, the *ONLY* way to dump excess heat is by radiation. You can't rely on just brushing up against some matter (e.g. whisps of gas) that's much cooler than you are (like we do on Earth, constantly): There is *NO MATTER* (to speak of) anywhere near enough to you to either help cool you down, or (annoyingly) warm you up. There is nothing around you that has "a temperature". You have a temperature; You are surrounded by nothingness. The only way you can lose heat is through radiation, which compared to other methods is *SLOW*... =:o\
Props for including a Canadian reference!
When i heard montréal i was like : SAY MY TOWN SAY It.
No, opposite way around :p
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
"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
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.
Oh wow Dr Gray is doing such a great job at delivering a strong message in a compelling way !
4:20 Got me thinking "plz don't use inches, plz don't use inches!" Yess, lego bricks! Finally a superior unit of length!!!
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!!
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.
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.
Pfhorrest, what you're saying makes sense, therefore I'm going with what you say.......
So do you think it's 80 or 100km?
@@frankhumbug That depends on how fast you're going and what your shape is.
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?
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'm terrified by the thought of separating those thin lego blocks
Use a knife to get in-between the layers and carefully wiggle it a bit. That always worked for me as a child.
@@DirtyPoul or you could just use a brick separator...
@@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!"
@@DirtyPoul yup, in fact they are going to make teal colored ones soon
Call LPL ( Lock Picking Lawyer )
Or Bosain Bill .
Tell Them " You Need Lego To Be Picked Open ."
Ah yes. A highly scientific school appropriate video about getting high.
Fantastic video! But in the quest for clarifying definitions... ...those are clearly Lego plates and not bricks (for understandable reasons of scale)... :-)
@@Nine_9s Feet to Yards aren't the only distance measures with a factor of three... ;-)
Love videos from Dr. Gray!
Humm...very impressed by Prof Gray's presentation skills, clear and concise!!
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.
Please make a video about the edge of the Universe where all the space ships fall into the abyss when they cross it.
Flat universers unite :3
@@sokiX1 the universe is flat.😜
The universes is donut-shaped. Homer said so.
You can't reach the edge of the universe, NASA agents would shoot you.
There be dragons
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?
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!
Love all the Star Wars droid sounds on those satellites.
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?
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.
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.
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.
"Vega" signal from the movie Contact !!
yeah!!
Yep, nothing near Adelaide, and that's the way we like it 😀
Now try pulling these Lego-Blocks apart again... legends say fusion occured between them and they shall never be separated again
This could be very important, because hypothetically If you put a space weapon just outside of space then it doesn’t violate the treaty.
NO EDGEEEEE
-hank green
dude no edge
I like the little throw-in from the movie Contact
This makes me realize how unlikely the construction of a space elevator would ever be, since it would have to extend to geostationary orbit.
Not necessarily. A shorter cable could hold the satellite in orbit at a slower speed, however it would create significant tension on the tether. The fun calculation is the need for a tether strong enough to hold the weight of itself and the force of the satellite on the end. Of course it would also be interesting if the tether snapped and fell back to earth.
@@MichaelSteeves Nope, any object slower than the rotation of earth that is below the geostationary orbit would fall back to earth. So no tension to the cable. It's counterintuitive, but lower orbits need to be faster than higher ones.
Litigious Society
Whilst you can launch stuff from geostationary you would need the cable go much further that geostationary orbit as you need a counterweight, this can be a big rock or a station of some kind.
@@MichaelSteeves I've imagined the tether breaking and piling up into a gigantic plate of spaghetti on the ground, feet deep and miles wide.
Well, a space elevator on Earth. Maybe on the Moon would be easier.
I find the definition of the Kármán line to super satisfying and also making a lot of sense.
The joy when you see a new Sixty Symbols video is up :)
14:11 Much love to the editing crew for putting in the transmission sound effect from Contact.
That subtle bit of the sound from Contact.
Very nice touch.
I heard the signal from Contact in the background on the geosynchronous satellites graphic 14:12.
And at the beginning when first discussing the Karman Line.
They totally did that!
I've always found that noise very eerie. :S
And also the imperial probe droid at 1:44 and 2:00.
NoLlama I scanned the comments to see if anyone had noticed that
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.
Maybe I'm an idiot, but I honestly thought this was a video about the size of the
universe, as in where the edge of the universe is. I forgot this isn't a space channel.
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.
@@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)
@@pongesz2000 cheers, that's fascinating!
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.
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
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.
@@ForOrAgainstUs
i wonder how they would feel about chinese spy satellites being in space just above usa.....
@@sabin97 There are multiple countries (including China and Russia) that have satellites constantly passing over the USA
@@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 just quietly, (loudly) fell in love with you guys. Respect! Amazing demonstration. I hope everyone on the planet gets to see this!
I suppose that plenty of people in Montréal will be happy that they are closer to space than Ottowa (and vice versa).
Man, that really puts the Lunar missions into perspective. Incredible that they pulled that off. Several times even!
That satellite chatter at 2:00 makes me think of playing Deus Ex.
Merciiii pour l’exemple de par chez nous!
Fun fact: when Space Shuttles were in service, ISS were at ~350km to take full advantage of the cargo deliveries by Space Shuttles. Now they've raised to ~400km to improve fuel economy by making less adjustments (due to atmosphere drag)
I can tell right now I'm going to end up linking this video in SO many online arguments!
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 :/
My favorite astrophysicist is also poetic! Thank you for sharing, Dr. Gray. =)
Space Issue Starts In My Cupboard And Ends In My Garage .
Always fun to hear Meghan's Haligonian accent interspersed with a few words with clear British pronunciation :)
Improperly titled. Space is everywhere in the universe. Where is outer space would be the threshold between space on Earth and everywhere else, which is the question being asked in this video!
Great episode. As always, Dr. Gray’s argument is enjoyable to watch. Thank you!
Probably the only thing I will ever remember from this video is that Adelaide is 100 km from nowhere.
Everyone should be able to see earth at that altitude and be in awe for days....
This can make a change.
flat earthers will still say it's somehow an illusion.
@@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.
@@VeronicaGorositoMusic
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....
Nice comeback with the Adelaide!
Beautiful Christmas Cactus!
At 11:30 you can clearly see some constelations like big dipper and orion right in the middle
The special effects budget of this video are incomprehensible. Image spending a fortune on lego blocks that matched!! Who has that kind of money!?!?
Thanks for using the Vega signal from Contact.
I like the Star Wars and Contact sound effects for satellites.
Easy : it’s when the music starts and time warp is enabled.
The Kerman line
Neil Tyson recently argued the "beginning" of space shouldn't be defined by how dense the air is but by the ability to enter a stable orbit
That's a lot better than the posited 9:38 "revisited/refined" ideas. Karman's definition has to do with orbit, the Saturn launches parked at ~105mi/170km but even with their relatively clean aerodynamic profile (compared to solar cell wings) its orbit was considered a minimum. "Dipping way into the atmosphere" 1:53 , like they don't have apogee at who knows, hundreds of km. The atmospheric layers type is the only redeeming model in this clip, IMO.
Anyone thought the title meant going to the edge of the universe?
Sound from “Contact” was great👏
"Not to scale"... it would be awesome if we could get a telescope that big :-)
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.
Good luck getting those 5 Lego pieces apart
14:!3 Nice touch using the transmissions from Contact as a sound effect.
Please let's keep it at 100 km. I like it there. I don't want it lowered. The edge of our atmosphere should be up there at a high enough number that you can experience weightlessness and clearly see earth's curvature. I like space.
The imperial probe droid sound effect was appreciated by at least 1 viewer
Never thought about this stuff. Human brain wants a concrete category to simplify the world and make it easier to understand, but the sharp edge is simply not there.
Thank you for the Canadian reference, really put it in perspective for me!
Science is ALWAYS daring the next generation of scientists to "cross this line"....the Karman Line is just the most recent.....I love it!!!! Tally Ho and onward, young scientists!
I wish you would have done this with a globe instead of a partial map of the earth. I think a globe would have helped people better understand the relatively small distances involved.
10:23 the shuttle still exists...just no longer in service.
how can physicists do these kind of questions? pure paradox
Cheers from Adelaide!
@06:14 The great gray stump!
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
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.
When the Karman Line was first calculated, that actual value was about 97 Km, but got rounded up to 100 Km just to make things simpler.
I think a better title would have been "Where does space begin?".
Everywhere!
Where matter begins to exist will be a hard one to answer.
It's hard not to read the title of this video and be like "Huned Kilomata."
Whoa! I never realized that on some flights the X-15 could have been hit by a satellite! (Highly improbable, but theoretically possible.)
why the sounds from contact? "one and only place that life exists".... that we know of.
So what you're saying is that Kerbal Space Program is closer to reality than the commonly used real-life definition? Got it. That's kinda awesome.
Great visualizations. It's nice to actually see the scale of the numbers.
Anyone else feel that "The Edge of Earth" might have been a better title?
13:07 "we ran out of fu**ing bricks"
I would like to think the aeronautical and astronautical folks can leave the Karman line where it is, and make definitional terms that are discrete.
We demarcate "fuzzy boundaries", to some extent, with sunlight: civil, nautical and astronomical twilight.
It wouldn't be hard to use extant rules-of-thumb to make lines or zones.
Civil atmosphere could be a line below which air travel for common human purposes is possible. Astronautical atmosphere could be the the boundary in which atmospheric effects still hold with a significant factor for orbit calculations, etc.
There is no edge of space. We are part of it. The better question would be where is the edge of the atmosphere.
11:10 beautifully said
Forgive me if someone has already done this but I remember reading that in proportion, the atmosphere of the earth is thinner than the skin of an apple :)