Yuri Gagarin and Orbits - Sixty Symbols

[jjclassjj]

This is a great video

[akaphaneuf]

i just discovered this channel through Documentaryheaven, and i'm really glad i did!

[jeebersjumpincryst]

wow.... I REALLY REALLY enjoyed that one :)

Always wondered about geo sync orbits, if indeed thats that right word.

[Devilock79]

GEOSYNCHRONOUS!! I just like that word. =P

[EpicMagicTrick]

If you mute the audio it looks like he's on fast-forward!!!

[matheusciola]

watch?v=uMRupkeNDNc&feature=pl­ayer_embedded

Assistam vao gostar ;)

[lambogeek]

Hohmann transfers are fun.

[FreeeeS]

Поехали! ~ Lets go!

[speedmatters]

Excellent video as ever. Thanks. Can you consider doing a video on Tachyons please?

[vvs2199]

@UNFLASHY We the human race.

[sixtysymbols]

@UNFLASHY yes, a Professor from England who was not born in 1961 was trying to take credit for the flight of the Soviet's Vostok 1 - you caught him out!???

[Vejita12]

@UNFLASHY

We, as in humanity.

[Sunderas]

@UNFLASHY I think he's talking about "we" the scientists... kinda dumb your comment... He's not trying to steal any credit from no one

[razhorblahd]

@UNFLASHY He is obviously referring to the human race.

[EPICT0ASTER]

@UNFLASHY we... as in, you know, humanity.

[alexanderhulse]

@UNFLASHY its an achievement for the entire human race

[aei05h1]

@UNFLASHY Pleeeassse, keep watching these video's and all video's like it!!

[Alcor3000]

Apparently the Russians (Soviets) didn't only lie about the parachute but also about the exact position of the launching site. It was actually 370km SW of Bajkonur.

[FreeeeS]

@Alcor3000 there was no lie just a common misconception of history baikonur was built after the succes of Vostok-1

[counterclockwise123]

Has Howard Bloom had any influence on physics?

[AppliedMathematician]

Very well,

but due to my innate curiosity I just have a Question.

What is that "Atlas of Creation" doing in the shelf there?

And what is is it about?

[traltixx]

@AppliedMathematician theres a video explaining that in the channel. its abit early on

[sixtysymbols]

@AppliedMathematician we've made a video about this (it is on a channel called nottinghamscience and a website called Test Tube)

[Poleschs]

@AppliedMathematician Atlas of Creation is a propaganda piece by a Turkish "William Dembski", a book trying to debunk evolution. The book was given for free to many universities around the world, maybe that's why they have it. Written by creationist Adnan Oktar.

[Scarlatti2007]

@Poleschs I noticed that too and I remember seeing a video with Richard Dawkins where he mentions the same thing that you mention about it being sent out gratis and unsolicited to academics. I thought it was pretty amusing to see it there on his bookshelf.

[coil311]

Fantastic video, thanks very much for taking the time to create it and explain the concepts and history.

[MrQuantumtheory]

Can you guys do a video on what exactly annihilation means when matter and anti matter collide, or at least mention it in a video because it's really bothering me.

[jens0]

Slovak captions on the map ! what a surprise

[clodester]

What about Copernicus? I thought his work on orbits and the planets predated Newton?

[elimik31]

When I was a child I was always fascinated by spaceflight. I always thought of it as something very complicated and mysterious. But now I finally understand that what these spaceraft are doing is simply falling around the earth. And the moon is falling around the earth, while the earth is also falling around the moon and both of them together are falling around the sun. I just love imagining it this way, it so much fun! Thanks for the great vid!

[LsBaba]

Interesting. I'd seen the cannonball thought experiment before, but this is the first time I recall the specific mention of the Earth's surface falling away, and the fact that the cannonball would be falling all the time as it orbited. I think this ties in with something Prof Brian Cox said on TV, about everything constantly falling in gravity-distorted space-time. Can anyone explain this... a video, perhaps?

[subach]

I'm a first year physics student, and I just have to say that working with Newton's equation for gravity has been the funnest part of class thus far. All you have to do is memorize G, earth and solar mass, use some simple algebra and substitution with uniform circular motion equations and you can work out the orbital mechanics of the entire solar system except mercury.

[G3org3Master]

Question, why is our solar system and galaxy thin rather then spherical? Anyone know? And does this affect artificial satellite orbits?

[525047]

@G3org3Master

Centrifugal force. All things in the universe are moving in some way relative to us and as a result make a shape. The disk shapes are a result of rotation. True enough even the earth bulges at the equator because of this.

[davewatcher]

His pronunciation of kilometer is wrong not only because it is a unit of measure and not an instrument (Kilowatt, kilojoule, kilogram, kilobyte, kilometre etc versus thermometer, barometer, mileometer, anemometer etc) but also because it really annoys me.

[hyungsup2]

@davewatcher He's not wrong. There's two ways of pronouncing kilometre. Your way and this lecturer's way. Just because you only know a way to do something doesn't mean that there is no other way of doing it. Would you be annoyed if I say that 1 billion is 1,000,000,000,000? Language changes over time....

[subach]

@davewatcher Dialects man, dialects...

[loserofnothing]

this guy rocks

[intemister]

I applied and am going to Nottingham U to study physics just because of SixtySymbols. 

[DeoMachina]

@intemister See if you can sneak into one of the videos!

[sixtysymbols]

@intemister great and congratulations... hope to see you around the place as we make more films!

[Moratorium]

@intemister Physics is a lot more challenging than what you get from those videos.

[nickmt]

@intemister so glad to hear that new forms of Science media such as the Sixity symbols channel are inspiring new generations to pursue their further eductaional dreams! Congrats on the place intermister and well done sixty symbols. Science FTW :D

[Mojosbigstick]

"I'll put a girdle round about the earth in forty minutes."

Puck, in A Midsummer Night's Dream. The first fairy in space.

[AbortedSheepFetus]

very interesting stuff :]

[ChiefDen4]

Gagarin wasn't the first cosmonaut in space, but he was the first that made it to space and survived the death trap that was the Soviet space program to tell the tale xD

[noxure]

@ChiefDen4 Death trap? Let's look at the facts here.

USSR: 6 fatalities. 1 in Soyus I, 3 in Soyus XI and 2 during training (including Yuri Gagarin)

Russian Federation: 1 fatality during training.

USA: 22 fatalities. 7 in Challenger, 7 in Columbia and 8 during training.

Mortality rate during actual manned space missions:

Russia: 0.9%.

USA: 4.1%.

[ChiefDen4]

@noxure I meant the early pre-moon landing space program, where many more than 6 most likely died but weren't reported.

[noxure]

@ChiefDen4 I know what you mean.  You're still wrong.

[1000wrongdecisions]

more sixty symbols videos please

[rhn94]

What are superconductors and how would they affect our everyday lives?

[jerzmacow]

@rhn94

lol just make sure you don't ask Michio Kaku that, he'll give you a 4 day lecture.

[nilbud]

@rhn94 Really good conductors would make buskers more tuneful.

[culwin]

These videos are GOLD jerry GOLD!

[Lolskatorian]

Newton did not have a full understanding of gravity, it took Einstein to disprove his theory to achieve the current accepted theory of gravity.

[CathySander]

@Lolskatorian: It's not that simple. What Einstein found out was that the classical description of gravity was limited, and as a result devised a better description for gravity.

[tinytina789]

''Planet Earth is blue

And there's nothing I can do.''

[barhamd]

I want to hear him and Professor Ed Copeland have a conversation. Both have such a distinct and opposite way of talking, and somehow soothing...

[BibleRefuter]

I've always wondered if you fired a bullet on the moon if it would orbit it, but then my mind goes other places like ways to actually fire a bullet on the moon since due to the lack of air the gunpowder wouldn't work and I'm sure that there would be other problems as well.

[barhamd]

@BibleRefuter What's neat about gunpowder is that it has it's own oxidizer. In other words, you don't need air.

[BibleRefuter]

@barhamd Oh really!? Cool!

[ReverendPopeFoxyFox]

"The earth was blue, but there was no god."

~ Yuri

[THEKINGOFEUR0PE]

@ReverendPopeFoxyFox Is that what your liberal science teachers told you? Evolution is a scam and a lie like global warming. God puts us here a little more than 6000 years ago. Evolution is liberal wizardry.

[ReverendPopeFoxyFox]

@THEKINGOFEUR0PE Uh... I was simply quoting Yuri Gagarin. I have no desire to debate someone who takes things out of context so quickly. And here would not be the place to debate anyway.

If a debate is what you're looking for, however, make a video, and I'll see what I can do to accommodate you in that regard.

[KzrrainzYes]

@ReverendPopeFoxyFox @passwordresetisbroke He's a troll.

[passwordresetisbroke]

@THEKINGOFEUR0PE You are joking, right?

If not what is someone with thier head so far up thier arse doing watching a video like this? Surely you beleive the sky is actually made of water like it says in your holy book. Or is that the Quran, is the bible the one with the firmament?...

[diediedie999]

@ReverendPopeFoxyFox he never actually said that....

[screezwiitz]

@ReverendPopeFoxyFox: real researchers and scientists don't engage in such crap topics.only those who don't have a clue about the real the unachievable amount of scales of nature (including oneself in those

scales) divert themselves with such silly little fights.

[odaymustdie]

@ReverendPopeFoxyFox "Its dumb to think god is orbiting eart"

~ Me

[arcadesj]

@odaymustdie "It's dumb to think Yuri Gagarin meant that God was supposed to be orbiting the earth, instead of understanding the symbolic and political meaning of that statement." ~Me

[gwaur]

Is the starting place of Gagarin's flight really called Štart?

[dppatel]

a neat fact about the pic shown at 6:35. that picture was taken from mars by the Mars Reconnaissance Orbiter on october 7, 2007. i believe its also the first picture ever taken of the earth and the moon in one frame. but i maybe wrong on that fact. 

[tilemacro]

@dppatel im sure the picture on carl sagans pale blue dot is quite older than 2007.

[mcarp555]

@dppatel The first Earth-Moon photo was taken in 1977 by Voyager 1.

[screezwiitz]

@mcarp555: so you talk about the date of capture of a photo...and not about nature or how it can be manipulated to destroy a part of humankind or to give benefit to a part of humankind that's still disadvantaged by it's human and non human surroundings. I would type: "fuck you" - but I read somewhere that limited minds take this as if it's an attack of the body of someone.

[mcarp555]

@screezwiitz What the hell are you on about, son?

[screezwiitz]

@mcarp555: you believe in hell? ROFL

[shaurz]

He had a great set of teeth... very straight and uniform.

[passwordresetisbroke]

@shaurz They are fake! Just like everything to do with space exploration! :P

Or at least that is what my conservative friends keep trying to convince me of.

[Probewitch]

Do you think education will be primarily a function of the internet in the future?

[IDuGiI]

your fucking smart...

[puncheex]

I don't believe it!! I get to correct the Prof: the escape velocity is about 11.665 km/s, not 6. It's actually about 6 miles/sec. Oh, the perils of metric conversion.

[SchumiUCD]

@puncheex The 6 km/s mentioned was the speed required to get something into a very low orbit if there was no air resistance, not the escape velocity.

[puncheex]

@SchumiUCD: I'm abashed; you are correct. To achieve orbit at the outer fringes of the atmosphere requires 6-7 km/sec. Escape velocity is the speed necessary to totally leave the Earth's gravity well entirely. I should have remembered that.

[blehblehbleh86]

@puncheex For an unpowered object, yes. You can leave the Earth's gravity well at 0.0001 m/s or lower if you can maintain such a speed.

[nois3]

would a really big electromagnet railgun be able to fire something fast enough to get into orbit?

[schlippien]

@nois3 Yes. Well, to some degree. Achieving escape velocity when the projectile exits the "barrel" is relatively easy. However air resistance means you have to fire it a lot faster than escape velocity for it to actually reach space. I remember reading NASA proposing a railgun/scramjet combination some time ago tho.

[Erverino]

What's wrong with his face?

[camelsonhorizon]

1/3 of all people that watched your video clicked the "Like button" cool.

[rhatcher010]

I absolutely love this series. Keep them coming.

[ben9345]

Could you make a video about Medical Physics like MRI Machines and X Ray machines. We need to know it for Physics Exams this June. I think I know it already but I might be nice to hear another voice explaining it and i'm sure there are others who need help with it!!

[30LayersOfKevlar]

@ben9345 There was an episode about MRI, search for "The Professor's Brain".

[ben9345]

@30LayersOfKevlar thanks!

[AguzSuiCaedere]

The earth move a bit in the meantime. Cute!

[Zee96969696]

yes the cannon ball around the earh is a great idea, and it is very simple, but how in the world did Newton come up with this, while he was doing all sorts of other really hard scientific work, how in the world did he think of something so simple and so evolutionary?

[Kargoneth]

@Zee96969696

Revolutionary? Maybe he just decided to try drawing lines on circles and noticed the fact that there is a point where the earth's surface and the projectile stop receding from each other (like the drawing in the video). *shrug*

[Kargoneth]

@Kargoneth Err... I meant encroaching upon each other.

[puncheex]

@Kargoneth: The revolutionary point was that he proved that the gravity we experience on the Earth (the fabled falling apple) and the orbits of planets were aspects of the same force, following the same rules. It gave a theoretical underpinning to Kepler's three orbital laws which were determined solely by observation. That proof required the calculus methods he had to invent.

[puncheex]

@Zee96969696: Like Einstein (and perhaps most brilliant theoreticians) he had the ability to abstract - simplify - physical problems in his mind, to do the equivalents of Einstein's thought experiments. He could intuit the results, and then had the ability to back those up with fully developed math and physics.

[perniciousnc]

very informative thx !

[Darw1n1st]

I LOVE your videos. Thanks a lot for making them!

[yitih]

You guys make fantastic videos!

[Penndennis]

Do you get tired of hearing it? I don't get tired of saying it. Wondeful, wonderful stuff!

[matics19]

*First living man in space.

[Brillyr]

This is by far one of the best of your vids. The explanation is very good! Though I knew all of this already, I very much liked to listen. He makes a great teacher.

[jessemaurais]

In North America you never hear of dates like this. Soviet accomplishment go unmentioned, as an unwritten rule, because it supports the myth that the Socialist project was an unmitigated failure.

[ConradSigma]

@jessemaurais My US History Class actually covered this a few years ago.

[puncheex]

@jessemaurais: Well, it does if you try to get your science from the popular press; to an extent they have always bought into the current political line, and of course there's always the popular non-fascination with nerdy subjects. Elsewhere, you can find out these things; I remember reading all about them in magazines of the time like Science News and Aviation Week, and the occasional "How we/they did it" article in Scientific American.

[GodofCider]

Only fifty years...Heh, I wonder where we'll get in another fifty. ^_^

[puretroubleman]

@GodofCider well it took us 10 years to get ready for a 3(???) day trip to the moon. so using that, it will probably take us 200 years at least to get ready for mars.

[9hello123]

@puretroubleman NASA has a planned mission to mars by the mid 2030s.

[GodofCider]

@puretroubleman Ah, but you're forgetting the rate of technological advancement in your calculation.

What was the equivalent?

A calculator of today, matched the computational power of the supercomputers of then? Something like that.

[puncheex]

@GodofCider: I'm reminded of Arthur C Clarke's statement, "When a very smart person says something is possible, he's very likely right, but when that person says something is not possible, he's very likely wrong."

[puretroubleman]

@GodofCider I took that into account to some degree. which is why I didn't say 800 years :)

[GodofCider]

@puretroubleman Hehe, I still think you're off a little on your estimation; but we'll see I suppose. ^_^

[zeffii]

many thanks yuri!

[wowkarbonkel]

meow 

[pietermarten13]

@wowkarbonkel MIAUW

[2bsirius]

We've come a long way since then...

[NomadSpirit555]

Escape velocity with a canon..

must be very BIG canon :D

[Zaekk]

@NomadSpirit555 Gauss cannons!!!

[puncheex]

@NomadSpirit555: See "From the earth to the Moon" by Jules Verne.