Why Does the Same Side of the Moon Always Face the Earth?
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- Опубликовано: 30 май 2019
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In this video:
One Moon “day” is approximately 29 1/2 Earth days. This rotation coincides with its orbit around the Earth so that we only see about 59% of the surface of the Moon from Earth. When the Moon first formed, its rotational speed and orbit were very different than they are now. Over time, the Earth’s gravitational field gradually slowed the Moon’s rotation until the orbital period and the rotational speed stabilized, making one side of the Moon always face the Earth.
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![Why Do We See the Same Side of the Moon? - [08]](http://i.ytimg.com/vi/k1kjeWJRg2Q/mqdefault.jpg)
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If the movie The Time Machine serves me correct, even before a billion years Humans will be extinct and the planet of the apes would have risen and fallen and risen again.
I'm sorry. As my hearing is not damaged like most folks, I can't stand that annoying low volume "music" in the background. I assume you do it to increase attentiveness, but for me, it is like trying to hear you with a mosquito buzzing me in the ear. For anyone whom it does not bother, please consider getting your hearing checked.
BULLSHIT! THIS IS NASASENSE STRAIGHT BULLSHIT!!!
THE ONLY TIME THE MOON MOVE IS ON TV!!! THIS IS NASASENSE just a silly cartoon they call CGI
Could you do a video about your team and how you guys do things and produce your videos? I love you guys that much Simon!
If we're really quiet, we can hear a flat earther's brain burst into flames.
Up about 6 comments.. lol
The moon is flat!🤔
@@joeyfeliciano9199 Must be side-on, then!
(S-S-S-S-Side-on...)
💥💥
@@joeyfeliciano9199 wake up sheep! Its a triangle! The govt is lying...ask the penguins!
"You'll be dead a very very long time " had me on the floor lmao
"Why Does the Same Side of the Moon Always Face the Earth?" So UFOnauts can hide on the far side!
Who needs a 7 minute video to answer such a simple question? The moon's orbital and rotational periods are the same, due to tidal locking.
People who don’t know any of those words you said, obviously.
You had to learn all of that at one point, and now other people can learn it here 👍
What a wonderful fragile planet we live. Thank you Simon!!!!
Who is Simon??
"There is no dark side of the moon. As a matter of fact, it's all dark." Where's the cheese?
There is no cheese. The moon is actually made of spare ribs.
Well, hello existential crisis. I wasn't expecting to meet you, here.
Came here for the science, stayed for the existential crisis
In theory, the universe will eventually snap back into a singularity during the big crunch. That means that no matter how much humans have Accomplished, No matter how much knowledge we have gained, even if we have colonized the entire universe there will be absolutely no record of our existence.
Brilliant video Simon. Funnily enough, I just brought up the Moon's slow drift away from the Earth while discussing hypotheticals with my siblings the other night. My brother asked how I know this stuff. Videos like this are one of the reasons I know stuff like this!
Yeah, and it's videos like this one is where Simon gets his info from too...
Because it's self-aware about it's "dark side"
It’s doing a better job than most youtubers
Jung smiles upon you
The moon is actually a hoax - there are no moon sides - The diurnal convergence of starsmoke and pixie dust combine to present the illusion of a celestial orb - or whatever -
there is no darkside of the moon we just cant see its other side.
Yeah, it only wants us to see it's good side.
Keith Richards will witness all of this.
If the movie The Time Machine serves me correct, even before a billion years Humans will be extinct and the planet of the apes would have risen and fallen and risen again.
"tidal lock"
Eventually the same side of the Earth will always face the moon.
Since the earths mass is much greater than that of the moons i doubt this is possible. In fact the moon moves further from the earth every year and eventually will fall outside the earths gravitational force
This is an excellent explanation. I can see how flat-earth people can state (erroneously, of course) that the moon is a flat disk glued to a dome facing us.
That's because the flat earth explanation makes more sense.
Got a tricky topic for ya: WHY does time FLY when you’re having fun?
Time flies like an arrow.
Fruit flies like a banana. (Groucho Marx)
It’s all relative
I like the videos where you talk about space most. Thanks Mr Whistler & TIFO!
I learned that it is always the outside of the moon facing towards the Earth. Similarly, there's a trick to finding your way in the woods without a compass: the moss always grows on the outside of the trees.
@Scott Harvey so it grows on the inside of trees?
The moon orbits the Earth once every 27.5 days with respect to the background stars. As the Earth has moved part way in its orbit around the sun in that time, the moon phases take 29.5 days to complete one cycle. The stars rise about 4 minutes earlier each night, the moon rises about 50 minutes later each time.
Finally someone who is paying attention. Thank you.
Show off!
not in my part of the world that doesn't happen
You’re fantastic at explaining celestial mechanics on a reasonably good level.
Because NASA only has that still image to use as an hologram, duh
But the moon been recorded for thousands of years...
@@Xo-3130 /r/woosh
@@acoffeewithsatan You say r/whoosh but given some other comments it's unfortunately not surprising anyone could seriously believe that's what you think.
He said science cap, not tin foil one
I actually already knew this. I still enjoyed this video. I liked it.
It's the backside of the moon that faces Earth. It's constantly mooning us.
Sometimes my grandad lets me poo in his garden
I want to load my brain into a computer and then load my consciousness into a robot and Snowboard and not worry about my knees.
Great video. Seems you could have given more bonus facts about the moon though. There’s a lot.
Simon, how much of this do you understand? How many times are you reading and think "What am I saying?" Always good stuff, keepit up. Cheers!
Lil.... You know, if you'd begin to actually *listen to your common sense*, you'd realize it actually doesn't make sense. It's ok to listen to your intuition!
When do you get to the part of the story where Werner von Braun has a reference to the firmirment on his tombstone?
"The moon is constantly trying to move away from the Earth in a straight line." Maybe look at centripetal force?
The dark side on the moon in fact receives almost 40% more direct sunlight than the near side
Take a drink every time some smart guy comments "actually, there is no dark side of the moon, it's all dark." It's fun.
Added bonus to spotting a Pink Floyd quote I guess...
Great! Something else to keep me awake at night!
I’ve seen a few interesting facts about the moon over the years.
I’d say one of my favorite are that there is an argument to be made about making the earth moon system into a binary planetary system due to the moons size relative to its host body (earth).
The other is that I guess there is some predictive formulas out there that’s just the fact that we even have an eclipse the way we do in the first place is so galactically rare, earth is a privilege plan it on a galactic scale as without The moon and how it operates in our solar system, we wouldn’t even be able to understand certain Scientific laws, like light bends due to gravity (Einstein‘s theory of relativity if I recall).
"... light bends due to gravity...". Arthur Eddington, June 8, 1918, confirmed Einstein by observing shifting stars during a solar eclipse.
We also have confirmation of Einstein by precisely explaining the precession of Mercury's orbit. Some astronomers theorized that another planet even closer to the sun, dubbed Vulcan, was tugging on Mercury. No eclipse necessary.
Speak for yourself, I intend to become a vampire and live forever. But thanks for the warning, it seems I'll have to look into getting off this rock at some point...
Youll have to find a way to feed your human herd once your off planet to not cut off your only blood supply. By then hopefully nanites can synthesize human blood for you and our other vampiric overlords. XD
Sync this explanation to "Brain Damage". "I'll see you on the dark side, of the mooooon…."
"There's no dark side of the moon really. It's all dark"
@@gilbertg7 Best Pink Floyd album, no doubt!
Simon your on so many channels there’s no getting away.....and I kinda like it love your biographics
Because the Sage of the Six Paths couldn't gather quite enough land to create a fully formed sphere, and a bit of the Ten-Tails is still sticking out the other side.
No. Hancock drew a penis graffiti with his blood.
Are you saying that Pink Floyd was lying and not going to see me on the dark side of the moon?
They also said " there is no Dark side of the moon really "
I was literally thinking this exact same question on the day this video dropped
Hey Simone, awesome vid as always! Just signed up for Brilliant, and it is Epic!! And I hate using that word so much. But it applies here, it.is.awsome.
Perhaps you should see if there's a vid on how to spell names!
Whey does the moon always try to hide it's dark side? Its embarrassed about it's tiny bulge.
I got a good laugh out of the line, ‘stolen by the moon.’ That’s a phrase I have never expected to hear...let alone hear it used to describe a real phenomenon.
You for all your diligent work respectable contact enthralling host pretty much one of the best RUclips channels around
if anybody's brain should be frozen it should be his
Not really. His articles are all written by other people.
@@anzaca1 You may not be aware of this, but that's where most knowledge comes from...other people.
There is no "dark side of the moon" that's a Pink Floyd album. There is however a far side of the moon. 😊
*Gary Larsen has entered the chat*
The 'Dark Side' of the moon is not referring to how much sunlight it gets. But referring dark as in the unknown or no communications. When a submarine is 'running dark' it stops communicating. Or if a satellite or covert operations or a spy etc goes 'dark' they don't all of a sudden stop getting sunlight.
The moon (and all other heavenly bodies) are luminaries inside the firmament! Something that you will not be able to physically land on...
@Raging S, I ment luminaries. Sorry my English is second language. (I just edited the word in original message)
I am gonna be dead in a billion years?!? I had so much planned to do!
0:47 I prefer Vsauce Goggles, but Science Cap works too lol
(its the spirit of Vsauce to which I'm referring, not so much the brand/channel)
What?
Like two plates in a cupboard, the flat earth and flat moon always face the same sides of each other.
Another brilliant sales video.
We spin 27 times for one spin of the moon and only ever see one side of the moon. And even on a leap year.
As a child, I was told this myth that coughing causes interruptions with the human heart beat. Is this really true or plausible?
That might be sneezing.
I thought it was yawning?
I had a 5th grade science teacher that could not GRASP that the ROTATION and the REVOLUTION were the same period. I will be fair - at the time I was in school in CALIFORNIA..
*Want to see a scale of how far the Moon is from Earth? Take a Sheet of common printer paper and turn it long ways (landscape). At the very left edge, draw an 8mm diameter circle and at the very right edge, draw a 2mm diameter circle. You'll say "No Way!!!" but it's true, the Moon is on average, 30 Earth Diameters away from Earth.*
*Note: Even this is still a lil short of true scale, cause the paper isn'y quite long enough, unless you make the Earth 4mm and the Moon just a 1mm dot, but it's very close.*
So you're saying that the 8mm/4mm example actually only shows the moon half as far away?
You know that's actually really stupid.
I don't think the moon should always face the Earth with one side. I'm tired of always looking at that little dragon. I think the makers of the universe should at least have the decency to rotate the moon so we can see something varied.
Hell yeah get that morning hitter, gang gang. Oh wrong channel. Cool seeing this in the morning though
There are so many comments that I can't read all of them and so maybe this has been said already. The Moon's solar day is indeed about 29½ Earth days, but its rotation (and orbital) period is only about 27.3 days.
It is nice to know that there are some problems that I truly don't need to be concerned with. ;)
Imagine mondays would last as long as moon days
What a lead in, Simon you're getting good at that, M.C., game show host your future is bright.
How can it when i see different marks on the moon
@FanOf Dueling bye bye!!
And in the cold war both sides have a thought of nuking the moon 😂
...Why?
@@Drace90
To put on a light show to say "see what we can do".
@@Drace90
There are actually some pretty good scientific reasons to "nuke" the moon. The explosion would vaporise large amounts of lunar soil and create a plasma, which would then emit distinct wavelengths of light based of it's chemical composition, by measuring this light back on Earth (or in space) scientists can then figure out what the moon is made from without even touching it. This is quite common in space exploration, although they usually forgo the nukes and just use kinetic impactors instead (fancy way of saying really fast bits of metal).
There is no dark side on the moon really, matter of fact it's all dark.
It is definitely not all dark. If you went to the Moon without a tinted helmet you might actually be temporarily blinded when on the side facing the sun, the same way you could be by sand or snow on Earth. The so-called "dark" side of the moon, refers to it as mysterious and unseen (like "dark" matter). It is an outdated way to refer to it, though, as we have sent crafts that show us what the other side looks like.
If it's all dark then how can we see craters on it with the naked eye?
LOVE the Pink Floyd reference! :D (Which the other two didn't get. XD)
@@kirabowie I'm proud of you sir!
@@sepehrshakeribaviloliyaie2440, thank you, sir! :D
Frigg’n Pink Floyd lied to us....
They were stoned
I love "today, I Found Out
Was that a burp? 05:18 LOL!
There is no dark side of the moon really. As a matter of fact it's all dark.
how the hell is my $300 textbook not this detailed?
My theory is gravity is not "pulling" but rather it the pressure of the universe pushing on all matter from all directions with matter slightly resisting this pressure.gravity is the path of least resistance.the more matter the more resistance on the pressure of the universe.
Cool!
What if the reason is when the moon was molten, the influence of earth's gravity pulled the moon's heavier minerals towards earth and the lighter minerals on the other side and then it solidified?
😢 this crap is too complicated, I'm going to the Flat Earthers! 😂😂😂
😂😂
You need to hit up Brilliant fam. Get up to speed in no time. 👌
@@wasmadeinthe80s I pay for RUclips premium to avoid ads bruh 😒
@@randyralls9658 its called sarcasm bro 🙄
This helpedme quite a bit:
ruclips.net/video/csd_rOZPkik/видео.html
Too many coincidence, the moon is a spaceship placed by extraterrestrials.
Slacking02 Ancient Sumerian cuneiform tablets say that our Moon is the moon left over from the demolished planet Tiamat, that we now know as the Asteroid Belt just beyond Mars. (Perhaps this explains how the Moon is perhaps older than Earth, & of a different composition, & perhaps even more as you described.) The ET part is that was what they told man to transcribe on the cuneiform tablets, the Anunnaki “pretending” to be gods to their puny human slaves, who they say that they refashioned in their own image from the ape hominids they found on the planet. 🤷♂️
*The Enuma Elish, The Seven Tablets of Creation*
That’s just the Moon. Earth was supposed to be formed from the other half of Tiamat, which was once a water world, just as we know Earth now
Slacking02 ...I think WE are the extraterrestrials that were brought here using the Moon. Our home planet was on the brink of destruction and the Moon was an escape ark, sent to earth to give us a new home. :)
@jimmyfly congrats for the correct 'you're ' seldom seen round these parts!
@@whatyousaidbud
But there's nothing more satisfying than when someone says "your an idiot." The irony of that blunder makes me laugh every time I see it. 🤣
The moon was a vehicle by which we were transported from our previous dying planet. It was an escape ark. When the time comes to need it again it will reactivate itself and whisk us off to our next home. :) (meh? Why not, there are crazier theories out there....LOL)
Hilarious. I know one thing. I'm on top of earth and it absolutely positively without a shadow of a doubt not spinning.
That is where you are wrong. And here is why:
You can calculate the centripetal acceleration due to the rotation of the Earth by using the formula a = v^2/r. Plugging in the radius of Earth (as is easily measured if you have any knowledge of trigonometry) and it's radial velocity gives you 444 m/s^2/6,371,000 m = 0.03 m/s^2 of acceleration due to Earths rotation.
That is why you do not feel the Earth spinning, the acceleration is absolutely minuscule (3cm/s^2!!!) and it acts in the same axis as gravity does anyway. So even if the rotation were significantly higher you still wouldn't feel like you were spinning, you would only feel lighter as the centripetal acceleration counteracted some of the acceleration of gravity.
The sad thing is, all of this is going to go over your head and you're just going to accuse me of being a government agent.
@@jeffvader811
That went completely over _my_ head. I won't accuse you if being a government agent, though. Thanks for the explanation!
@@jonathanconnor7920
No problem! If it helps, m/s^2 is just a measure of acceleration, it means how many metres per second you will speed up by in a second. On Earth if you drop something 1 second later it will be going 9.81m/s, after 2 seconds it'll be going 19.62m/s and so on. The spin of the Earth works in the opposite direction of gravity, but it is so small in comparison you can't feel it.
@@jeffvader811
Awesome, that did help. I took a screenshot of your explanations for future reference. Thanks again!
There should be a huge difference in gravity between a position on the equator and a position on the north or south pole
Very interesting science, Simon. However, I tend to lean toward the artificial satellite hypothesis. For instance, explain how and why the moon rings like a bell when struck... _(Explain it without it being a hollow metal sphere.)_
No one in the sciences will talk about that, they prefer to ignore that tid bit. Discussing that means you have to ask uncomfortable questions that lead to even more uncomfortable possible answers.
Ignorance is bliss.
The same side of the moon always faces the earth because it doesn't want to moon us
Nice👌🏼
*you’ve earned my subscription* I don’t say that often and I especially thought I wouldn’t with you tbh but…
The moon is quite nice but it has a dark side.
So why aren't we locked with one side of the earth facing the sun
"That's not a moon, it's a space station."
lol i thought the sponsor would be alcor after that last sentence
Why is your voice so satisfying?
Does this occur with all planet's moons eventually?
Most likely not, the moon is very large in relation to the Earth compared to the satellites of other planets, so it would have a more profound effect on us than say one of Jupiter's moons does to it.
Because it's a 2D unanimated Sprite.
What are some other examples of Tidal Lock? Are there other moons in the solar system that are also tidal locked?
www.quora.com/Other-than-the-Earth-to-the-Moon-what-are-some-examples-of-bodies-that-are-tidally-locked-to-another
If the moon is slowing the earths could that affect the magnetic field
That's not really known. We actually know very little about our our magnetic fields.
I've got an interesting question: Can a British-American citizen become the Primeminister of the United Kingdom and then later President of the United States?
Only if they take up residence on the moon for six months first.
You would have to be a natural born citizen of both
In order to be US president you have to be born in US. I am not sure what the UK laws are regarding the leader.
@@Marika50 The location of your birth does not matter but you have to be a natural born citizen, I know people that were born in Japan and Germany to US service members on foreign soil but are natural born US citizens, And would be able to run for the office of presidency
The UK allows citizens of any Commonwealth country to become PM. The US is not a Commonwealth country though.
American law allows any American citizen to hold citizenship of any other country as well. So a natural born American could take UK, or Canadian, or Australian... citizenship, become President then later become UK PM.
* Subliminal Advertisement: *
(Simon's dark side): If you didn't quite understand this video, maybe you *need* a Brilliant subscription?
29.5 days, the same as the length of the menstrual cycle.
Yeah. We need more morons
And that’s where the term “lunacy” comes from! :D
@@UGNAvalonIndeed it is.
You are correct. That is why the lunar calendar is considered to be matriarchal, and results in a 13 month year. Turns out, Christians dont like that very much.
@@UGNAvalon Lunacy was a term that referenced a hypothesis that said ppl with bi polar conditions would be more affected by a phase of the moon over the others which was never proven. Eventually it became a catchall term for mental instability.
Some graphics illustrating how the tork works would have been nice, still interesting :D
Some Monkees episodes would let you know how Tork works.
@@collectingonthecheap56353 I meant in this specific case, how the tork is produced
Simple observation here I know... however I did the math and according to some science the earth and moon as we know them are some 4.5 billion years old and at the rate of 3.2cm/year that would put the moon 144,000km closer to earth (385,000km (roughly) distance currently). What would those effects have been around back then?
Sometimes your titles I stare at and just say, “... yeah... why?”
I think you’re turning into SciShow Space...
The way you segued into the Brilliant advert was simply brilliant!
We have a moon? Nobody told me! 😉
HEY VSauce! Michael here!
Can you rappel down onto a parking lot from a helicopter when not in an emergency?
If you are robbing a bank, yes. Although...I guess "emergency" would depend on the point of view.
To be honest I did not grasp a single concept he presented....that was one difficult, convoluted explanation that sailed right over my ass.
The picture of the Moon over the Earth's ocean at 0.54 unfortunately does not show the side that is visible from the Earth but rather the Moon seen from a point about 90 degrees away from the Earth. Unfortunately this stock photo is often used in different media, even when it is supposed to show the Moon seen from the Earth.
Amazing. But I think the friction term is not quite accurate. Maybe orbital or momental drag.
if you are like me and didn't understand anything this guy is saying here is a far better explanation from a youtube channel that has far fewer viewers. Earth's Moon: Why One Side Always Faces Us - RUclips