Moon Phases: Crash Course Astronomy #4

[@940351579]

In school they just said: "here are the phases." Years later and I just now really understand how a full moon works. Thank you, CC.

[@septembersun1503]

I really blame school for not instilling in me the passion to learn about our universe because this is so fascinating but when I was in school i was just so focused on grades and tests that I couldn't comprehend just how beautiful everything is

[@sign543]

There’s no way to absorb all of this in one sitting 😂 But it’s so fascinating. All the things I didn’t learn in school!

[@MyMasterController]

Phil's enthusiasm and passion shine through in these lessons!

[@SupLuiKir]

Don't worry Luna. It's just a phase.

[@shaheerthekhan]

· 0xFFF1 why doesnt this have more likes

[@notascoobyreally7520]

· 0xFFF1 that is the most pleasing thing I’ve read all day! Joyous!

[@ash2694]

This moon pun is just shining so bright on this comment section that it definitely deserves more likes XD

[@seanxing6091]

Bruh you legit just copied that from the internet.

[@hellobbazul]

@@seanxing6091 Jeez, way to ruin the moment.. ;~;

[@badastronomy]

Hey folks! A lot of you are bringing up the Moon's rotation (near vs. far side). I didn't cover it in this episode, which is just about phases, but I'll be talking about it in a later episode about gravity, and again about the Moon itself.

[@gandalfthegrey2171]

Will you be doing any talks about Gravity at some point? It's just so perplexing and interesting to me... I have so many questions (I don't know anything about astronomy really, but I'm super excited about starting some at Uni) Like what is it’s speed? Is it faster than light (logically: no) how do you even measure it’s speed if it slows down time? do you have to measure it separate from time? (can they be separated?) How does it affect us immediately and long-term, and what are it's far-reaching effects, on the universe, it's origins, its existence, appearance and functioning. As I said, I have lots of questions, it's all a bit of a mystery to me (I don't expect that'll change, since our knowledge of what we don't know increases faster than our knowledge of what we do know) But I LOVE your channel... space, the universe, all it's perplexities are just awe-inspiring!! I feel small, but it's great to admire it all :)

[@Omnilatent]

I was a bit disappointed you didn't talk about lunar eclipses in this episode. It's one of the things I don't quite understand yet Nice episode otherwise

[@doctortequila5268]

Gandalf The Grey Watch Interstellar, that'll give you some Astronomy hype!

[@gandalfthegrey2171]

Migario Lamplight I have actually! Not too bad!!

[@doctortequila5268]

It was pretty accurate for a movie

[@ljmastertroll]

Yes I do want to sound more astronomery.

[@crashcourse]

***** We're here to help you with that. ;) -Nicole

[@PatrickAllenNL]

I think that term will also be usefull in American Football

[@afafelfet9095]

CrashCourse thank you very much very very much for your courses that realy helps a lot thank you

[@joshuarieder2865]

+CrashCourse Does he tell everyone that the distance between the moon and the Earth can fit all of the planets in it? The more you know, right?

[@sarahlewis6341]

+Joshua Rieder is that acc true?

[@sonyan1191]

"Mysterious as the dark side of the MOOOOON!!!"

[@victori2335]

BE A MAN!

[@BTEIreland]

Pink Floyd

[@fromlaoswithoutlove]

🌑🌒🌓🌔🌕🌖🌗🌘🌑 Its how

[@stevebustanutinme9226]

Woah there, Phil, looking a lil too cool in that jacket

[@cheeseisgood360]

lol

[@Iruparazzo]

"the moon is half lit" so am I!

[@nostrebornod]

Listen to him say that at half speed and it becomes more relevant.

[@christinecarson2808]

And I'm fully lit

[@zealotguy]

Bruh

[@thedebatehitman]

Then you must be listening to Pink Floyd’s, The Dark Side of the Moon.

[@g_giovanniii]

Yeah

[@TheZerovirus1000]

I love the fact that he's the one that writes the episodes

[@timmyt1717]

My friend suggested I check out this channel and I'm amazed at all the things I've learned just from watching a few of these videos. Hate off to you and your entire crew at CrashCourse, the work you do is most informative. *applauses*

[@DeedeeBettis]

This series came at such a perfect time! I'm taking astronomy this semester and this is just helping me understand it better. Thank you!

[@IstasPumaNevada]

Good timing for me as well, I'm just getting into amateur astronomy. :) Also Phil Plait is great.

[@trixiigirlful]

Same here!!! 😀

[@mariovssonic2]

I like the variety on this channel. Change is good once in awhile and I am sure that John and Hank have better things to do than host like 4 shows at once. They do have lives you know. I am sure that they appreciate the assistance and the additional hosts, so why can't we?

[@SigurdKristvik]

Can't agree more :D

[@sortedsortof3474]

They have lives?

[@TrevorSchmahl]

Phil Plait is the man and a great host!

[@김두아-r5n]

sorted sortof BWAHAHAHA

[@rednafi]

waxing cresent>waxing gibbous>waning gibbous>waning cresent 1quarter fullmoon 3quarter i learnt more astronomy here than in my whole school life

[@natersart6854]

This video is great but i'm ever so slightly disappointed that he didn't explain any of the odd things that commonly happen to the moon, like eclipses, or when it turns red-ish-orange, or when it's huge and looks like it's crashing into Earth. Perhaps that will come in another episode.

[@crashcourse]

We're just getting into the phases of the Moon today. There's an entire episode dedicated to eclipses next week! -Nicole

[@Liamufasa]

CrashCourse What about the mechanics of the Earth-Moon relationship? I'd love to know more about libration, precession and even how the orbit of the moon changes over time.

[@i208khonsu]

CrashCourse Excellent! I was just thinking we'd have to wait for Astronomy 2 for this. Hope to see some excellent animations of it's inclination. I don't think a lot of people realize how extreme the Moon's inclination is with Earth and how it relates to the frequency of eclipses.

[@natersart6854]

oh fantastic

[@IntricateUniverse25]

someone correct me if I'm wrong, but to answer your question about the moon appearing to look huge. It is always the same size, it's just an optical illusion. It only looks big because our brains compare it to reference objects on the horizon such as tress or buildings.

[@KevinLambertperfected]

I love me some john, hank, wheezy and emily....but Phil is INCREDIBLE at these crash courses. He reminds me of NDGT and Bill Nye with how well he narrates. This course is quickly my unexpected favorite

[@michaelo.1320]

"We call the part facing the sun the daylight or bright side, and the half facing away the night or dark side." Thank you for that, Crash Course. I kept fucking that up.

[@Bootwhiskers]

If there are people out there who didn't know this stuff, and they do know it now, then Crash Course has done it's job as an educational resource. Don't belittle the intelligence of people who are trying to get onto the first rung of the ladder!

[@fred321cba]

The phrase "dark side of the moon" often used to refer to the far side of the moon, so Phil was making the terminology clear to avoid confusion and put this obsolete usage to rest. I'm sure he wasn't doing it to illicit snarky comments from a smart-alec like you.

[@IstasPumaNevada]

Bootwhiskers As XKCD pointed out, for every bit of "common knowledge", there are 10,000 people hearing it for the first time every day.

[@fred321cba]

***** How is the moon "all dark" other than during a full lunar eclipse?

[@pegeman1510]

Moon doesn't lit so it is dark all the time. It is the reflecting portion and non-reflecting portion.

[@Ythelettery25]

TYSM I have a quiz today and this helped me sooooo much thank you!

[@stephyy0619]

who’s here cuz of hw!!??

[@baileymin]

me

[@adeebharb007]

Capstone project but close

[@ethantin]

Me

[@palvindarchhokar9821]

I love this guy, he's such a good presenter!

[@riab224]

I was just saying to myself yesterday: "I hope Crash Course Astronomy does a video on the phases of the moon." Wish fulfilled!

[@ShadrachASMR]

His head has so much gravity, it has its own moon!

[@ThatOneJustMe]

I've been fascinated by the moon ever since I was a child, I even have a tattoo of it, so even though I knew everything that was mentioned in this video, I still liked it a lot! One thing I didn't know was the word 'earthshine', what a lovely word for that wonderful phenomenon!

[@msthekath]

Thank you so much for not only the informative video, but for adding accurate SUBTITLES!

[@usmanchughtai1751]

New moon emerges: Terminator Line: I’ll be back 🕶

[@MilesRoseProductions]

"The Terminator", huh? I'd have named it "The Twilight Zone" myself...

[@junglemom1263]

😂 I like it! 👌🏻😎

[@shashankkotapati4982]

#2019 Its weird that everybody is watching this during like 5th grade, but Im watching this during 8th grade Thanks Crash Course, u never let me down

[@MisterMrinz]

I passed out of high school 7 years ago & I still find this fascinating :D

[@VatoLoco91]

Im 28 screw you guys

[@JuliaN-fi9zw]

I’m also in 8th tryna pass a test lmao

[@guhmuhtruh]

I'm in 11th grade

[@JuliaN-fi9zw]

Good news everyone! I took my moon quiz today and I passed with 100%

[@VandrefalkTV]

I cannot get enough of these! Thank you so much!

[@jippy33]

I'm finding Phil's voice more and more soothing the more I listen to him. He was overly nerdy to begin with, but then again so was Hank. He obviously loves his field of expertise which makes it all the more enjoyable! Also, I was wondering about the lightly lit part of a new moon just a few days ago, wondering why I could barely see the rest of the moon. Earthshine!

[@Diesereine-typ]

bro i love this duded love for the sky. i just love his vibe man

[@AyushmanSaini]

Thank you! You just helped me visualize it better to understand it. However, you should have also covered the fact why moon isn't dark due to earth's obstruction on full moon phase. Otherwise, i loved it!

[@GeneticFreak]

Damn fam that moon is lit af

[@abcdcarllucero3280]

*736 dislikes are **_flat earthers_*

[@arielb98]

This video really summed up two of my professor's lectures in under 10 minutes. Thank God for this channel because I was lost in the class.

[@j0nthegreat]

thanks for this. the moon constantly baffles me with it's seemingly erratic behavior. i'd never realized that the moonrise and set were related to the phases.

[@InfectiousLaugh]

I love crash course astrology! Phil is very eloquent.

[@assassingio9847]

This is one of the best informative,cool and full of knowledge series i have seen.I'm learning new things for the wonderful world of the universe every day.It's so amazing what we can observe but unfortunately we are so caught up in our daily lives that we miss so much.

[@philip0320]

Moon: I'll be back.

[@emmabardsley3067]

I laughed a little too hard..

[@Luna-by8bo]

I will.

[@marshad5017]

Weeird

[@sumayyahhai4601]

Love how you take us through the tiniest details that most would dismiss.

[@V0Y463R]

This is my favorite episode. I love the moon. When she's out, I lie outside and sleep under her light.

[@Luna-by8bo]

Eclipsa Thanks, I know, I’m pretty cool.

[@TonyTheDoomLord]

I really like Crash Course Astronomy. hope these videos get more views so we can see more of Phil!

[@kaushikwavhal3403]

Totally loving the astronomy series.

[@mathematics117]

I think this is better than the last ones. I think Phil is getting in the swing of things- can't wait to see the next ones! :3

[@MelodicalMedia]

watching phill was the purpose of my life

[@Werepie]

lol, best "terminator" reference I've ever seen.

[@Davesurveyor]

You make me desire to be an astronomer!

[@jeff-dg7km]

this man's voice is so soothing

[@arpitab9169]

For the first time I understood this concept so well..thanks for sharing,in such a wonderful way.❤️ed it so much.

[@chloestrochnetter2189]

Excellent Video! I appreciate these so much! Great tools for teachers!

[@SpeckInTheUniverseMihirSemwal]

Ahhhh....cleared many doubts,, thanks CrashCourse, keep up the good work B-)

[@gingergamergirl98]

Speaking of the moon, where I live, tonight (September 27th, 2015), there was a total lunar eclipse (therefore it was a Blood Moon) AND it was a supermoon (the point when it looks the largest because it's the closest to Earth in it's orbit)! It's about 6am for me, so it's still out, and actually, it's shining directly into my bedroom window (though the actual eclipse started at a little after 7pm, reaching totality a little after 9pm. It stayed in the total phase until about 10:20pm, and was full again at about 12:30am). But I don't think think I've ever seen a supermoon before!!! Also got really lucky because it's super, super clear out. Not a cloud in the sky. And light pollution where I live is a bit less than it normally is, and I can see the Milky Way too!! And it's still soooo big and bright! It's really bizarre and cool looking. I just can't put into words how beautiful and awesome and cool and weird and strange and bright and bizarre it is.

[@gingergamergirl98]

Oh! Also, I got a really cool pic just before it reached totality, so it's red on the left side (from where I was standing) and silvery white on the right side, with a black stripe down the middle. Super awesome. Seriously though, it's bright. I also took a picture about 2 hours ago and it looks like I tried taking a picture of the sun, but everything else is dark and it looks really strange and COOL!!!

[@maximusdizon7267]

+gingergamergirl98 correct me if i'm wrong but are you from southeast asia? specifically from the Philippines?

[@gingergamergirl98]

Master Max JEDI Nope. U.S.

[@nobadragoon6499]

+gingergamergirl98 that's super cool

[@gingergamergirl98]

NobaDragoon It really was

[@aaronthenorm5400]

Very illuminating!

[@robloxwithcupcake]

Anyone else here because of their teacher?

[@raidz.1x767]

pretty much everyone lol

[@MarshallMelloooo]

Me

[@MarshallMelloooo]

Online Classes science

[@RummyRide]

sadly

[@daedric4904]

@@RummyRide Yes Sadly

[@vayarre]

Thank you for correctly saying (at 2:18) that the month is based on the period of the cycle of lunar phases (a synodic lunation) and not (as many others have erroneously said) on the period of its orbit of the Earth (a sidereal lunation). The former is ~29.53 days; the latter ~27.32 days.

[@bz7420]

OMG thank you!!! I have to write an essay about the moon's phases tomorrow! Perfect timing!!!

[@zainabatif936]

8:57 made me smile.

[@Nikki5M]

Thank you SO much for your incredible videos!! I'm a homeschooling mama and your videos are so perfect for incorporating within our curriculum! Really appreciate it :)

[@Thicite]

this series covers lots of very simple stuff, but I like it :)

[@garethdean6382]

Will we see a discussion of the planets and their similar changes? Or is this video just a phase Phil's going through?

[@RealTwistedTwin]

I see what you did there ^^ :P

[@garethdean6382]

RealTwistedTwin Yeah, I'm a bit of a lunatic sometimes.

[@verdiss7487]

Gareth Dean You will suffer for what you just did.

[@garethdean6382]

Verdiss Come now, come now, no need to be so mercurial about this.

[@gephc4]

Gareth Dean You're a jovial fellow tonight.

[@TheFireflyGrave]

What a wonderfully clear description and visualization of the phases of the moon. Best I've seen.

[@xXxJSCOTTxXx]

Who else is a time traveling Mayan sent to the future to watch CrashCourse videos in order to invent a lunar calendar and stop your hand from disappearing?

[@alonsorojas3829]

Awesome episode. I'd love to see more about the moon.

[@tanner1ie]

On looking at the Moon with binoculars or a telescope, it's interesting that you only see the "face" on the Moon if you look at it with your naked eyes, but that face disappears when you use such a device to see it in more detail :) . It's also nice that technology has progressed enough that gaming technology can replicate this appearance of the Moon :) . (In at least one recent game i've played, possibly GTA V, you can see this effect of seeing the face on the Moon when you simply looks up at it, then the face disappears when you zoom in on it :) .)

[@angeliemaebonaobra4448]

Best moon video lesson ever

[@sulaimaanahmad]

very informative video, i'm very into luna. after all, our religious calendar is based upon it's phases. 😊

[@AnjanikumarASD]

Thank you.. Very easy to understand

[@camillej]

Astronomy is life. Best class I ever took, I'm so sad it had to end :'(

[@AwakenedSoul101]

This was great. I learned quite a lot within a few minutes. Thank you

[@Scott-J]

Great video. Easy to understand. I feel like I might actually remember the names of the phases now. And Earthshine, how cool is that? Well done.

[@lilELLA08]

Could you explain why it is that the moon looks different depending on where on earth we are standing? I try to wrap my mind around it but I can't! Maybe you have a good graph? Thanks for the awesome work, CrashCourse!

[@Half_Centaur]

Phil's voice reminds me A LOT of Adam Savage's, from Mythbusters. It's a little deeper though.

[@JoschuaSchmidt]

Thank you for clearing things, especially about the view we cant get on a new moon. I was always struggling with this.

[@moxsedai]

I like this guy, he's a nice break from John and Hank. Don't get me wrong, those guys are awesome, but this guy is pretty good at this.

[@zaczhang6871]

Thank you! That really helped for my friends to understand how lunar calendar works!

[@jonatan9924]

Muitos bons vídeos. Por favor, continuem a legendá-los em português. Tal conteúdo educativo é imprescindível para nós, lusófonos. Gratíssimo.

[@Hisuiforlife]

Thanks😊

[@87licorice]

Thank you very much- best channel on KZbin, you condense so much quality knowledge into such a small easy to digest time-frame.

[@toddolson573]

All that's been done here is to name the way the moon looks from month to month, nothing else is true what he is telling. Do I have proof ? Scripture.

[@baxtaylor]

You're joking.. right? Please tell me you're joking.

[@87licorice]

Todd Olson Scripture...proof...HAHAHAHAHAHAHAHAHAHAHAHAHAHAAHHAHAHAAHAHAHHAHAHAHAHAHAHAHAHAHHAHA get outta here buddy, you're a joke. We would still be back in the middle ages if we relied on your book.

[@87licorice]

Todd Olson And I was referring to the whole astronomy series in general you imbecile, I just chose to comment here.

[@87licorice]

Baxtrus You talking to me or the other imbecile mate?

[@1101Archimedes]

Haven't started the main video yet, but I just noticed that the animation moon at the beginning, just like Earth's real Moon, always has the same side pointed toward its barycenter. Nice touch! :)

[@IzaakCha7]

Does CrashCourse endorse Moonman and Notoriouskkk with that video thumbnail?

[@quavosmotorola5577]

+Isaac Chay I know I was confused

[@quavosmotorola5577]

+Landen Brock lmao

[@kman8016]

notorious kk moon is originally from McDonald's big Mac Comercial "mac tonight"

[@demonking86420]

Yes

[@royriley6282]

Astronomy is best served like this, beautiful and profound.

[@Tbiblaine23]

*Subtle moonman reference*

[@a.monach7602]

When you put a minority killing moon in your kid friendly video.

[@jesp1423]

WE WUZ

[@PyxisCinema]

That's because the earth is flat and the phases of the moon are caused by the sun being behind the moon then slowing moving directly in front of the moon. Lunar eclipses do not happen...

[@SKD1859]

XD

[@xyza4867]

Tbiblaine23 ..

[@Michelle-xw5rs]

THANK YOU

[@currylightemup2258]

Your intro sounds like a Good Mythical morning rip off😂🔥

[@daydays12]

At last I understand - such a clear simple intuitive explanation - thank you !

[@fromnorway643]

This is piece of cake for anyone with a normal understanding of 3-dimensional space.

[@hafsadissanayaka3244]

Our physics teacher told me and my classmates to watch cause we are doing online classes

[@MuslimAmericanGirlz]

Another great episode :)) Great job!

[@PinkChucky15]

The first and third quarters are my favorite phases of the moon. You can really see a lot of detail where the dark side meets the bright.

[@ecoconatus8089]

Very interesting, thank you

[@harry_page]

1:35 I'll be back.

[@jamesoreilly3791]

These videos are fantastic, it's great that these people take the time to teach us about what they study. I can't wait to learn more. Thanks.

[@itswhatyoumakeit6950]

SO COOL! very clear to see how much you love this! Really appreciate this! Your enthusiasm moved me! It is comforting, and applying these sacred geometry laws into a human sense is damn near magical!

[@sumtourist9406]

Wow. I'm always looking forward to the next CC:A.

[@sarfioa]

Whose in 5th and is here to be able to get good grades....

[@teshaunarussell9635]

Love this video! Its so great and very informational!

[@Aaron-P]

Great video! If only the moon's librations could have been worked into the script. Maybe a future episode about lunar observation?

[@crashcourse]

Aaron P We've definitely got more Moon to discuss in future episodes. -Nicole

[@410clove]

this was an awesome video. interpretation is based on perception...so for me..this was super spiritual. I thank the universe for your cogent explanation.

[@strder1776]

When the moon comes back to a full moon: As You Can see... I am Not Dead!

[@hananebenselama5503]

HELL YEAH. I was so behind and this just saved me I love youtube and crash course and this dude.