How do Phases of the Moon Work? What Causes Them?

[@valkoshka]

This is THE BEST Moon Phases video out of the thousands!! It truly helped me visualize, understand and remember the phases -- and to get 100% on my Astronomy quiz :) I would so much appreciate an Astronomy 101 package of videos, for each unit of my course -- because my instructor just is not providing the material or support students need to really process the material. The teacher in this video is just awesome. He really understands how to present concepts clearly, in context, with applications, and multiple perspectives and approaches to seeing problems. Great teaching, and enjoyable learning experience. I would gladly pay for an Astronomy package, so that I can enjoy and succeed in my course. I will post the unit topics and cross my fingers :) We are using the textbook Universe 11th edition by Geller, Robert M. It looks like we'll be covering mostly chapters 1 through 16 or so in the course. Huge thanks!

[@Laura-mx1ip]

You did such a great job! no one has ever explained this as well as you did. And I’m in my 50’s. Thank you

[@schonique]

I could watch this tutorial forever! Astronomy 🔭 is my favorite subject!

[@MathAndScience]

Glad you enjoyed it! Me too. Love astronomy!

[@WayneBraack]

I am 62 years old and I always thought it was Earth shadow. And yet somehow it never seemed right to me that it was. And so consequently I was always just really confused. Now I understand this topic and I truly appreciate your efforts in putting this out there.

[@tandavaar1598]

The biggest mistake you have done is not being our science 🔭 teacher when we were in school 🏫😂 Really appreciate YOUR take ... perfectly palatable to even a kid.💯🎯

[@MathAndScience]

Awww thank you so much. Very happy you like it!

[@pamelaforth7820]

If you like this, sign up for his other classes. As Tony says, THEY'RE GREAT!!!!

[@irrefudiate]

The second Moon-phase chart is better because it has the orbit of the Moon in the same general plane as that of Earth. The other chart had the Moon's orbit perpendicular, which made it harder to visualize. The important take-away is Earth has no part in the light or dark of the Moon except on the rare occasion of a lunar eclipse.

[@okumufelix9555]

Actually I have studied astrophysics over and over again but I couldn't be satisfied, now am even over satisfied . Thanks God bless you

[@kingme79]

Thank you, sir. You really spelled this out for me. Much appreciated. People need to learn about this subject.

[@charbam9506]

Really well explained; a thorough, enlightening and quality video - thank you!

[@blockbyblock4078]

I cannot tell you how much I appreciate you for this demonstration you did with those all props. I have spend days searching for the right video to truly understand the phases of moon and while they were good, they couldn't properly explain the alignment thing which you did here perfectly. Imagining the right scale HELPS A LOT. Thank you so much! Now, I can make students understand the phenomenon more properly. Again, can't thank you enough for you effort. You're so cool!!

[@MathAndScience]

Wow thank you!!

[@adamsilva5321]

The best explanation I've seen so far. Congrats for showing the different relative sizes and distances and how they change the perspective of how the moon is perceived.

[@davidwilliams3274]

Superb job Jason. Excellent content and presentation as usual. Your enthusiasm for the subject is infectious.

[@MathAndScience]

Wow, thanks!

[@dylanvanzyl401]

I needed this video last year.

[@normawooten3073]

Thank you this was so education ❤

[@marnew1000]

Thanks again, brilliantly explained, the distances are totally mind blowing. Great subject

[@jameswalters1958]

Thank you so much for this video. Excellent explanation

[@themistoklis26]

Thank you sir.🙂

[@JamesEscobar]

Wow this channel is extraordinary, and invaluable! Thank you for all that you do here!

[@MathAndScience]

Glad you enjoy it!

[@bucs2021]

Excellent explanation; your methods are unique, and so professional. It is a pleasure.

[@MathAndScience]

Thank you very much!

[@EraSofia-mt7pr]

I have a really big test soon and I was soooo worried that I would fail .You just saved me !Thanks 😊

[@MorrisJohnson-ud4zq]

This is the best video I have ever watched of space science .I could be my science physician please coz ur explanation rocks ✌💯💥

[@rangarajunanjundagowder4530]

Teaching is outstanding

[@ttocselbag5054]

I am intoxicated by this stuff. Thank you so much for your work good sir! 😊😊

[@MathAndScience]

So nice of you!

[@carmenhammonds4918]

Your last chart you showed us on the yearly moon may i ask is it the gregorian or julian calendar just a thought?? Thnx for your response and great video!😊

[@rogerkearns8094]

There was a nobody lands on it phase, then a people land on it phase, but since then it's been a lot like the first phase again.

[@DonJohnson-u9i]

So show how a solar flare ejected from the sun takes 2-3 days to hit earth as everything is circling around the sun traveling corkscrewing through a non moving space at millions of miles per hour on a pancake shaped galaxy while the stars are always the same

[@sailorman8668]

Just out of interest, do you tell your family and friends that you're one of these deluded and gullible flat earth believing fools, or do you wisely keep your embarrassing belief to yourself?

[@emanijeans]

If the sun is what cause the reflection, then it should be lit up like a full moon when the sun is right behind the moon on a eclipse. It shouldn’t darken the sun because if the sun is what cause the full moon then it should create a light source

[@sailorman8668]

Are you one of these deluded clowns that thinks the moon creates its own light?

[@nypdbob]

Thank you

[@carmenhammonds4918]

😊 So the shadow of the moon moves from rught to left whether its waxing or waning ?? Is this correct?? Thank you for ur video very informative and detailed. Have a great day!😊

[@fahimkhalasi4115]

thank you keep going

[@lon9540]

Great explanation, just too much repetition, this could be done in half the time. Excellent explanation though. Repetition is exhausting.

[@josneira1827]

i knew this stuff already, but i have to say your explanations are superb, it is always easier to demonstarte concepts and phenomena's etc when you have images props and video though, than if is with just , written words, that i know from experience. trust me. But seriosuly you are an absolute born teacher, you realize that the pupil understanding what you are infering, is the most important aspect of the skill, wish all teachers were like that, some of the ones i had would seriousy shock you, keep up this fantastic devotion my friend, maybe you could even convert Flat Earth believers to at least allow them to stop and think for themselves,, and as Neil Degrasse Tyson always says "question everything especially authority"....cheers ps i was just joking with the FES reference.. thx

[@JO-iv4xw]

Do you have any videos on remote sensing techniques used in astronomy? Thanks for the great content as always

[@MathAndScience]

Unfortunately not but might do some in the future!

[@calsrf]

I always wondered 😊

[@drumtwo4seven]

Nice 👍

[@billwalsh388]

I've never been happier to know we have a moon.

[@tresajessygeorge210]

THANK YOU... SIR...!!!

[@MathAndScience]

Most welcome!

[@pekkagronfors7304]

Excellent lesson.

[@MathAndScience]

Thanks! 😃

[@hildablanco1591]

Which moon makes the Earth's ocean tides higher or lower and how it shifts the season's

[@pamelaforth7820]

Thank you, I always wondered, but my teachers couldn't even explain it.

[@fromnorway643]

I suspect that an alarmingly large portion of the population believe that the Moon's phases are caused by the Earth's shadow falling on it.

[@nirmalmishra6404]

Math and Science, a channel of light, Bringing knowledge to us day and night. From counting to programming, they teach us all, Making learning fun and breaking down walls. They cover all subjects, no stone left unturned, From general science to chemistry, they’ve learned. They explain complex topics in simple terms, And leave us with a thirst for more to learn. They ignite a spark in the hearts of young minds, Inspiring them to explore, to search and to find. Their lessons are engaging and memorable too, Making sure we all retain what we learned too. Math and Science, our guide to the stars, Leading us on a journey, free from scars. So let us all tune in, and never miss a show, For their teachings will shape the future we’ll know.

[@MathAndScience]

This is amazing!!!

[@nirmalmishra6404]

@@MathAndScience Thanks

[@AirwavesEnglish]

This is so cool, Nirmal :)

[@kristieparker7101]

Why is the dark part of moon see thru though

[@zbigniewbrzezinski8869]

Doesn’t the moon also rotate around itself? Does that affect what we see on earth? Besides that, the orbits of the Earth and Moon should also play a role how the moon is seen from the earth.

[@MathAndScience]

This is true, and we do see the same side of the Moon all the time, but it doesn’t affect the phase of the moon that we see. If you search my channel, I recently released a video on why we see the same side of the Moon that’s a separate topic and I have a video on that.

[@carmenhammonds4918]

​@@MathAndScienceIs that the name of ur video "Why we see the same side of the moon?? Much appreciated.

[@natal8261]

yes!

[@turidboholm2587]

I would love to see you explain and draw what happens beyond the Nordic circle. How come the midnight sun, and the absence of the sun, happens during summer and wintertime. We love your work😊

[@MathAndScience]

Really appreciate the kind words! I’m actually working on a video now regarding how do the seasons work and as part of that your questions will be addressed!

[@truthseeker457]

@@MathAndScience Hi sir how's it going.today my teacher has talked to me about a metal conductors relevance to temperature and that's made a huge impression on me. Particularly conductor can be so effective under 100Kelvin. Can you interpret about that wider. Thanks in advance.

[@umgozy]

I have a question why does the moon phase start at new moon and not at full moon

[@sailorman8668]

The 'beginning' of something is usually when it's small. It's logical to start the lunar cycle at the new moon phase, as the amount of light on the moon's surface progresses from nothing, up to being fully lit.

[@hemrajue3434]

I had the misconception that moon just reflects the sun light but that's not the case especially during full moon. What about moon eclipse?

[@AirwavesEnglish]

A lunar eclipse and a solar eclipse happen only at certain periods where the sun/moon/earth happen to be in alignment. This doesn't happen very often though because the moon's orbit around earth is slightly off-set and we will only see eclipses when they line-up perfectly.

[@hemrajue3434]

@@AirwavesEnglish how does the earth look like on the moon when they are aligned?

[@jerzyiwanowski8231]

this presentation is katastrof !

[@VULKANKNIGHT]

I wish you were my science teacher maybe I would have paid more attention 😂😂😂

[@Bob-zg2zf]

Would you please make a video on SpaceX?

[@MathAndScience]

I’m thinking about doing a starship video when we get a bit closer to launch!

[@สว่างตากระจ่างใส]

1. Yes, the moon revolves around the earth. 2. But ! There are conditions: 3. The moon always turns on its original side and is attracted to the sun. that is, always facing its original side towards the sun. No matter how it rotates around the earth. 4. The shadow that we see on the moon is not the earth. It is the dark side of the moon. 5. What can be confirmed is that a lunar eclipse (Lunar eclipse) will occur when the earth is in position. Midway between the moon and the sun This causes the moon to pass into the Earth's shadow. A solar eclipse occurs when the moon is positioned between the Earth and the sun. Make the moon's shadow fall on the earth. Which will happen very quickly.

[@sailorman8668]

You have made a very big mistake in what you have said in parts of your comment. The same side of the moon always faces EARTH, not the sun

[@สว่างตากระจ่างใส]

@@sailorman8668 Thank you for telling me I misunderstood. 😄

[@insoft_uk]

Isn’t time for a new time and date system as they are base60 tho the world is base10 and using the metric system so perhaps a metric time system as one day humans will live on other planets if we wish to preserve the human race and time and dates will be different on other planets

[@benchapple1583]

Maybe I've made a mistake. Isn't all of this really obvious and taught in primary school?

[@fromnorway643]

It should be, but either it isn't, or most people have forgotten it.

[@bias6557]

By what you're saying it would be impossible for the moon to cover the suns light in a solar eclipse or at anytime

[@sailorman8668]

From your comment, it's obvious that you didn't understand what was explained in this video. Just out of interest, what 'object' do you think passes in front of the sun during a solar eclipse?

[@bias6557]

@@sailorman8668 From your comment you lack the honestly in looking at anything logically. Anyone that understands light and motion would clearly see the moon had nothing to do with Sun on that day.

[@senlyly6213]

👍

[@jamespfrancis776]

👍🌷👍

[@robertbozzelli5393]

Can you explain why after 6 months (earth moving 180 degrees about the sun) the day and night on earth haven't switched? dark at midnight and light at noon and vice versa. Thanks.

[@fromnorway643]

Because our timekeeping and clocks are synchronized to the Earth's rotation relative to the Sun, not to distant background stars. One day relative to the stars is 23 hours, 56 minutes and 4.1 seconds, which is called a *_sideral_* day. During that time, the Earth moves almost 1° in its orbit, causing the Sun's position in our sky to change that much. It takes almost 4 extra minutes for the Earth's rotation to "overtake" the Sun, and that solar or *_synodic_* day is on average 24 hours plus a few thousands of a second. If our timekeeping was linked to the sideral day, the day and night as defined by the Sun's position above or below the horizon would indeed have switched places after 6 months.

[@TheCosmicGuy0111]

Ooo

[@paulatlin9067]

Would be nice if we could view you on Public TV ..... Saturday morning

[@MathAndScience]

Wow what a compliment. Thank you!

[@hanrealistic]

explain 28 days moon cycle one by one. For each day show us where the sun is, where the night sky of earth and position of the moon and it's phase. Just 28 day pie slices top down animation.. I pay you 10 grand if you can...

[@sailorman8668]

I will pay YOU 10 grand if you can explain what 'object' passes in front of the sun during a solar eclipse.

[@hanrealistic]

@@sailorman8668 I don't know. But, it's NOT what we have been told

[@barryschwarz5960]

and click, now I understand.

[@chadovic]

🌒🌓🌔🌕🌖🌗🌘 🌍 ❤️❤️

[@MathAndScience]

Love this!

[@realcygnus]

Nifty ! & a trigger for flerfs ! 🤪& yes, they do indeed walk among us, even in the 21st century mind, perhaps by the millions. Anyway, they simply can't scale or 3D. Hell, most can't even 2D. Maff ends somewhere near long division in FEtardia. & being objectively wrong is like their badge of honor. This would would only be sad but, since they really think that they know WAY more than EVERY actual expert combined, its also absurd, aggravating & funny. 👊🐒🤣

[@squarerootof2]

Except the surface of the moon is not white, it's pretty dark and therefore it shouldn't be reflecting so much sun light. Also the moon light is colder than the moon shade. Those are questions that need answering.

[@AirwavesEnglish]

I'll answer these simple questions for you: 1) If you shone a light on a black bowling ball in a pitch-black room you would be able to see it because the light from the torch is STILL reflecting from the black ball. The sun is a little bit brighter than your torch and can easily illuminat things that are MUCH further away from the moon, like Mars and Saturn, both of which you can also see with your naked eye. 2) Where did you hear that the moon light is "colder" than the moon "shade"? Cold and hot has nothing to whatsoever to do with this topic anyway.

[@squarerootof2]

@@AirwavesEnglish Yes, of course the sun light can illuminate objects very far away but that doesn't mean those object's reflected light can illuminate objects 400.000 km away like the moon illuminates the Earth. Try a few experiments with potent lights and you'll see. Not only reflected light from a dark object is weak, it diminishes according to the inverse square law. And I didn't hear anything about the moon-shade temperature , it is a very basic experiment you can do yourself at night with a simple thermometer. 1. Try shining a light on a black bowling ball in the dark room. If you'd ever done it you'd see its reflected light is practically zero. In fact it absorbs all light and the only reflections are from other objects in the room. Science is about experimenting and asking questions, not about parroting things you've heard from others.

[@AirwavesEnglish]

@@squarerootof2 I took the liberty of addressing your point in capital letters to make them easier to follow. I hope you don't mind, I'm not shouting! 🙂 @Airwaves English Yes, of course the sun light can illuminate objects very far away but that doesn't mean those object's reflected light can illuminate objects 400.000 km away like the moon illuminates the Earth CAN YOU SEE THE SUN IN DAYTIME? YES. CAN THE MOON SEE THE SUN IN DAYTIME? YES. CAN YOU SEE THE MOON, YES YOU CAN. WHAT'S THE PROBLEM HERE? WHY SHOULDN'T YOU BE ABLE TO SEE THE SUNLIGHT ON OUR MOON? WHY ARE YOU TRYING TO MAKE IT MORE DIFFICULT THAN IT NEEDS TO BE? Try a few experiments with potent lights and you'll see. Not only reflected light from a dark object is weak, it diminishes according to the inverse square law. YOU ARE AWARE THAT OUR MOON IS PRACTICALLY OUR NEIGHBOR AND THAT THE SUN IS MUCH MUCH MUCH MUCH FURTHER AWAY AND ALSO MUCH MUCH MUCH MUCH BRIGHTER? WHY DO YOU THINK THAT WE SHOULDN'T BE ABLE TO SEE THE REFLECTION OF THE SUN FROM THE MOONS SURFACE? IT DOESN'T MAKE ANY SENSE.And I didn't hear anything about the moon-shade temperature , it is a very basic experiment you can do yourself at night with a simple thermometer. AGAIN, TEMPERATURE HAS NOTHING WHATSOEVER TO DO WITH THIS TOPIC, WHY DO YOU KEEP BRINGING IT UP? WHEN YOU SEE A FIRE ON THE TV, IS IT HOT? DO YOU GET UPSET AND DON'T BELIEVE IT'S A REAL FIRE JUST BECAUSE IT'S NOT HOT? THIS IS THE SAME KIND OF ARGUMENT YOU ARE PROPOSING. THINK OF THE TV AS A "REFLECTION" OF A REAL FIRE THAT HAPPENED SOMEWHERE ELSE. SEE HOW YOUR INVERSE SQUARE LAW AND HEAT AND TEMPERATURE ARE NOT RELEVANT HERE? 1. Try shining a light on a black bowling ball in the dark room. If you'd ever done it you'd see its reflected light is practically zero "PRACTICALLY ZERO" IS MEANINGLESS. IF YOU CAN SEE THE BOWLING BALL IN THE FIRST PLACE, YOU ARE SEEING THE REFLECTION OF THE LIGHT; IF THERE WAS NO REFLECTION, YOU WOULDN'T SEE IT AT ALL. AGAIN, SIMPLE TO UNDERSTAND. In fact it absorbs all light and the only reflections are from other objects in the room. NO, IF THE BOWLING BALL ABSORBS ALL LIGHT, THEN YOU WOULDN'T SEE IT, WHICH ISN"T THE CASE. YOU *DO* SEE THE BOWLING BALL WHICH MEANS BY DEFAULT IT *IS* REFLECTING LIGHT. WHY DO YOU THINK THAT THE "OTHER OBJECTS IN THE ROOM" WOULD BE REFLECTING THE LIGHT , BUT NOT THE BOWLING BALL? RATHER TRY TO IMAGINE A HUGE HALL WHERE A BOWLING BALL IS HUNG FROM THE CEILING AND THE ENTIRE HALL IS PITCH-BLACK WITH NO OTHER OBJECTS AT ALL IN THE HALL. WOULD YOU SEE THE BOWLING BALL THEN IF YOU SHONE A SPOTLIGHT ON IT? IF YES, THAT MEANS THE BOWLING BALL REFLECTED THE LIGHT TO YOUR EYES. *AND* SOMEBODY ELSE IN THE HALL WOULD ALSO BE ABLE TO SEE THE BALL. Science is about experimenting and asking questions, not about parroting things you've heard from others. I AGREE, BUT YOUR QUESTIONS ARE VERY EASILY EXPLAINABLE. THE ONLY REASON I'M PARROTING THEM IS BECAUSE YOU ARE REFUSING TO USE COMMON SENSE AND REASON BUT INSTEAD ARE STARTING TO SOUND LIKE A FLAT EARTHER. THESE THINGS ARE VERY EASILY DEMONSTRABLE AND HAVE BEEN CLEARLY UNDERSTOOD FOR CENTURIES ALREADY. IT'S MORE A CASE OF YOU NOT UNDERSTANDING THE CONCEPT THAN THE ENTIRETY OF SCIENCE BEING WRONG.

[@tomterific390]

"...the surface of the moon is not white, it's pretty dark and therefore it shouldn't be reflecting so much sun light." Oh jeez, are you a FLERF, too? Of COURSE the the moon is going to reflect sunlight. The Sun is hella bright...and a) the Moon is NOT a black bowling ball, and despite being so far awy from Earth, it's STILL close enough to reflect a significant amount of light from the Sun. "...the moon light is colder than the moon shade." No. "Experiments" purported to support that idea don't take into account the fact that shielding the ground from moonlight allows less heat to escape from the ground, so of course it will be colder when unshielded. That's shown by the same difference in air temperature between shielded & unshielded ground even during a new Moon, when it isn't ANY moonlight coming down. "Those are questions that need answering." They've already been answered a zillion times, but you goofs never let facts interfere with your feelings, so you keep dredging them up over and over. The stuff you're trying to claim has been repeatedly debunked. Go away.

[@squarerootof2]

I really love it when people get so worked up and triggered over some simple questions. As if it was some kind of taboo subject no one is allowed to talk about or mention. And you get insults from people too, lol. What kind of mental problems or insecurities do you people have?

[@raythink]

imagine a flat earther enters the chat.

[@MathAndScience]

Lol!

[@chocolateccm1493]

Nice try and it is still SUPERNATURAL because you don’t know if that explanation is the actual truth outside of what we “think” we know. The exercise was beautiful-but no scientific explanation replaces supernatural phenomenons! Thank you.

[@sailorman8668]

Perhaps YOU can explain what causes the changing areas of light and shade on the moon's surface throughout the month, if you don't agree with what's explained in this video?

[@dennislong7852]

Psalm 105:5 says, "😢Who laid the foundations of the earth, that it should not be removed for ever." Maybe we should just believe the Creator's Text Book, the Bible.

[@sailorman8668]

Maybe we should believe the FACTS of the situation, as clearly explained in this video.

[@michael.forkert]

_BS from the beginning to the end through verbose cheating, and prestidigitation._

[@sailorman8668]

You sound like one of these indoctrinated and gullible flat earth believing fools?