Ancient Greek Astronomy

[@Astronomynatureandmusic]

What a wonderful video. Your calm voice, the relaxed pace, accompanied by clear, carefully selected and to-the-point visuals. A real story teller if you ask me.

[@LaunchPadAstronomy]

Thank you so much for those kind words, I truly appreciate it!

[@iancormier7550]

@@LaunchPadAstronomy I just wanted to say the same. This was a great video to show my son. We just got our first telescope after using binoculars for a while, and he is enamored with space. I'm trying to learn my history to at least answer some of his questions. Thank you for this

[@LaunchPadAstronomy]

Thank you, Ian 😊

[@Coherentm]

it’s a rarity to find such an exquisite combination of features in a person thank you so much for existing and sharing with us your amazingness

[@ggzyt_livitup3898]

Yay! Progress!!!!

[@কাব্য-গ৬থ]

Lol

[@faramund9865]

Dude this video is great. Wish there was more of this.

[@Rustyzip53]

I'm going through your older videos and find them interesting and valuable. A while back I took Coursera class on astro-archaeology. This professor claimed the shafts in the Great Pyramid of Khufu could not be ventilation shafts because vertical ones would sufficed and have been easier to make. He also claimed that the south facing shafts pointed to the stars in Orion's belt and Sirius. His conclusion was that the shafts were to "direct symbolically the Pharaoh to his proper destinations in the sky."

[@LaunchPadAstronomy]

That's very interesting. I understood it to be so that the Pharaoh could watch his kingdom but I'm willing to defer to the archeologists on that one.

[@gregtavarez3322]

@@LaunchPadAstronomy you guys still believe it was built for the pharaohs? Why? Do you not realize that the shafts point to the constellations because they MAYBE directly influence the power generates in the giza pyramid? I mean cmon use common sense.

[@cheekiblin690]

Early astronomy sounds more challenging than it does now due to a lot of reliance on assumptions, even Eratosthenes had to assume the distance between Alexandria and Seyene. Ptolemy's idea of epicycles and the difference around Earth to explain retrograde motion was very interesting, and definitely a thinker in his free time!

[@geothon]

He had the distance measured by the hired professional walker. Sure he had to assume that the number he was given was correct, but the actual measurement was performed.

[@therestinghornet6906]

This was such a fun video, I hope you still make videos like these, I learned a lot

[@LaunchPadAstronomy]

Thanks! I've made a few others since this one.

[@PresidentoftheManosquare]

I fell in love with you at around 1:40 with that flat earth joke

[@LaunchPadAstronomy]

lol, thanks!

[@inessamaria2428]

hahahaha

[@retrogrademotionpictures4985]

Excellent video. Great explanations of the concepts involved.

[@LaunchPadAstronomy]

Thanks, Retrograde!

[@paulatreides9806]

Eratosthenes was one hell of a genius .

[@iwillnotcomplyistandformyf6642]

For real (if he was still alive to this very day flat-earthers would yell at him

[@nonridiculousadjective6597]

Great video ! I used information in this video as schema for part of my "year work" and of course I included your video in links.

[@LaunchPadAstronomy]

Fantastic, I'm glad it helped. Thanks so much for letting me know!

[@sm6756]

Great great summary video

[@LaunchPadAstronomy]

Glad you liked it!

[@feynstein1004]

Lovely explanations. I think Hipparchus' and Aristarchus' calculations of the distance and size of the sun and moon would've been even more awesome. It shows that we didn't just come up with the knowledge we have today and just how effective math, in this case trigonometry, is.

[@LaunchPadAstronomy]

Thanks. Thought about going there with the trig but wanted to keep it at the 101 level.

[@borabirkardesler4952]

Wasn’t it Eudoxus of Knidus, almost 4 centuries before who proposed an explanation to retrograde motion ?

[@Chase_baker_1996]

I absolutely love this stuff

[@remali26]

Great video!!! Well done sir, well done!

[@LaunchPadAstronomy]

Thank you!

[@Mythologos]

The idea that anyone today believes that the earth is flat is also BS.

[@darrenenright1728]

Ha ha says someone who thinks spinning around a vacuum of space at 66666mph, whilst rotating at 1k mph 🙄 🤣 😀

[@Iburn247]

​@@darrenenright1728because we are

[@darrenenright1728]

@Iburn247 in your mind you are ! It fantasy & programming at thd highest level. If you take the time to research it's an obvious, provable deception. They're numerous demonstrable,repeatable proofs that expose the ridiculous heliocentric lie. Start at the moon landings which are absolutely nonsense!

[@NicholsonNeisler-fz3gi]

You’re a flat-earther denier?

[@randomdude7812]

Aristotle's haircut is dope. Hhaha Thanks for video. Your video was shown in our class this morning. Just doing a review

[@LaunchPadAstronomy]

Glad you liked it! Aristotle was pretty jacked as well. The dude lifted.

[@Davecabuso]

This video is informative

[@itsyagirlAerie]

Based on the video, state the important contributions of ancient philosophers in ancient astronomy and how do we utilize them in our day to day basis?

[@ayyappanramasamy3080]

Thank you. Nice Information

[@LaunchPadAstronomy]

My pleasure. Thanks for stopping by!

[@elizabethmacharia9786]

I am working on interpreting this to spanish, for personal use, and its kicking my ass. Thanks for the video.

[@Josie-jy9kz]

These videos are the most concise and helpful explanation of the absolute basics of astronomy I have yet to find, thanks so much for making them! Now I have a chance of being able to bluff my way through pretending to be an ancient astronomer during my next DnD game.

[@MADMAX9]

Best explaination ❤️

[@vikaskatiyar9185]

I have liked the video now & watch it later because undobtly ancient technology was great.

[@RinoLovreglio]

Beautiful work

[@Chamorristaxd]

awesome video, thanks

[@LaunchPadAstronomy]

My pleasure, I'm glad you liked it!

[@glenngaseby4077]

jeez this helped me so much. thanks

[@LaunchPadAstronomy]

I'm glad you found it helpful. Cheers!

[@drd460]

Nice video! Query: 2:34 wasn’t the idea that the stars are at varying distances from the earth (or sun) rejected by ancient astronomers? Wasn’t the idea of a celestial sphere the prevailing idea?

[@markwhein5395]

Not all , anything that went against the teachings of religion wasn’t talked about as openly

[@alexstevensen4292]

Imagine if the star parralax thing was visible the whole history would have been different.

[@LaunchPadAstronomy]

So would the entire universe, since everything would be a whole lot closer :)

[@thesickbeat]

How does it follow that if stars move a little bit that the earth is a spinning top that wobbles?

[@lofiburrito2649]

Amazing video! But I had a question. You mentioned that the library of Alexandria was burnt and its contents were lost. And Claudius Ptolemy had complied most of the work and published in Almagest. Julius Ceaser sieged the city in 48 BC and around the same time the library was set on fire. Ptolemy wasn't born until 100 CE. Could you please check this? How was Ptolemy able to gather information for his book?

[@User-TheSilverHair]

It was burnt twice

[@markwhein5395]

Erastosthenes of Cyrene wasn’t the first to calculate the earths circumference, not even close

[@SindreGaaserod]

Superb work!

[@LaunchPadAstronomy]

Thank you!

[@GabrielXander]

Great video!

[@kyra1751]

great video! this was really helpful for my research on early astronomy! i don't doubt your research abilities, however, i'm sure you've experienced how difficult it is to find correct information online, especially on youtube. that being said, is there any way you could list your sources for the information you presented?

[@Heliocentric]

What can you not verify? Everything can be looked up yourself.

[@1MsPerez]

I did not know this

[@EkkaXavier]

Super

[@fentistan]

Thanks.

[@peterinbrat]

It's important to be clear the Earth's shadow only crosses the moon only during eclipses and not during normal lunar cycles.

[@nicosimeonov]

15:15

[@brej2002]

Very helpful!!! thank you

[@ipadprogamer6763]

Now that’s genius 😳 we just study the stuff in books which was worked on by actual geniuses and think we are intelligent :p I mean just look how they observed and amount of reasoning they put in! Such a class !

[@NicholsonNeisler-fz3gi]

Greeks used a little geometry and had no problem figuring thr earth was round

[@maryroseyadan4424]

Is this a Evolution of ancient Greek astronomy?

[@danielrequejo1802]

i using this to teach

[@Spark-In-The-Dark]

Daniel Requejo, you’re teaching misinformation...

[@lecinquiemeroimage]

Daniel Requejo, use your own works and convictions to teach !

[@agniyogabyinessa]

Where is the second part of this video?

[@namitkamani4732]

before aristotle, Valmiki wrote ramayana and described our sky very accurately. Indians knew about astrophysics before aristotle and all.

[@jwell4638]

Skipping past Thales and Anaximander...

[@subaruguy5786]

Imagine using math, current data, and recorded history at the same time to come up with current knowledge….

[@Heliocentric]

What about Anaximander and the Central Fire. Was he not Greek?

[@Heliocentric]

If you did the epicycle animation, awesome. I tried to create them myself several years ago in adobe flash, but i was absolutely confused by the equant, eccentric, et cetera. Im working on a video now on the history of gravity before newton. Ptolemy really did a number on astronomy, but his model had the math and the church behind it.

[@LaunchPadAstronomy]

Thanks. I recreated the epicycle animation in Keynote, since that's what I use when I teach my classes.

[@zy9662]

I'm curious about which names gave the Greeks to the planets. Did they called the planet Jupiter: Zeus? It it apparent to the naked eye that Jupiter is the biggest planet? Also would be interesting to see which solar system models were developed by Eastern Asians

[@antonyka-pra-ra]

Jupiter = Zeus Pater ( God + Father ) Zeus = Deus , Dios Dio

[@walt3223]

Sphere, like a globe, not round like a pancake. 3D not 2D, X, Y, Z, not X, Y.

[@liamconverse8950]

The problem with eratosthenes calculation is how did he know the distance of the sun? The entire calculation is based on the assumption that the sun is so far away that all the sun rays will be parallel to each other. It's not really scientific to just assume that.

[@danbouzu]

Nise

[@wcovey9405]

thought the Earth was a sphere. Wording is important for the right meaning.

[@shorefulislam6902]

May i dubbed your video in Bangla?

[@pretzelbobrocks2865]

Ptolemy is and was right. Ever heard of the the Golden ratio. It's in everything. Why would as above be any different??

[@1MsPerez]

Yooooooooooooooo!

[@DanielLopez-dy4xj]

ancient greek would not be called greek

[@LaunchPadAstronomy]

They'd call it chatting.

[@EmilDragonul]

Geocentric!

[@User-TheSilverHair]

What about the south shaft. That's suposts be Isis. Don't talk bout that huh?

[@Baliken100]

I was into this, until you went "south of the south pole" lol sorry, very confusing for us simples

[@rajujaiswal9607]

O

[@walt3223]

Spherical not round. A cylinder is round. A cone is round. They know that the Earth was a Sphere, like a basket ball. Clauduius Ptolemy did not call the book we, in our time, call the Almagest, for him and his time it was called by another name, a more impotent name.

[@lilianaprina5991]

I love this video is very useful and enjoyable. Guess what the world is not flat, it just looks that way in a map flat plain. Our planets are spherical...It is clear in the forms being photographed.

[@lilianaprina5991]

Aristarchus of Samos was correct at such an early time in history about Astronomy, it is amazing. We are a Sun centred universe and planets rotate around the sun. However, nobody believes him...According to what I read so far Ptolemy was wrong about a geocentric earth-centered universe. However, Ptolemy was correct about how our planets rotate.

[@axiomist1076]

This was ok until you started talking about equinoxes, then retrograde and epicycle on the deferent. Brother ! This "explanation" is for someone who has studied astronomy in depth. If you want the general public to understand what the heck youre talking about, you have to define your words. Afterall, any body who can understand all this doesnt need to have it explained.

[@LaunchPadAstronomy]

You may find it helpful to check out my previous videos in this series where I set up some of the topics referenced here: kzbin.info/www/bejne/n2PIYZSIqdymebs

[@GloriousIllyria]

Ancient World Spoke Albanian 🇦🇱🇦🇱🇦🇱 Proof -> Alexander The Great = Ai Ka Le Si Ëndërr = He Was Born Like A Dream Olympia = O Lumtë Shtëpia or Illi Mbi = Glorious House or The Star Above / The Star In The Sky Aphrodite = Afër Dita = Near Day / Dawn Pelasg / Pelasgians = Prej El / Yllit = From The Star Dorians / Dores = Të Dorës = Strong, Hardworking People Illyria / Illyrians = Ill Rri = Star Dwellers Graeculus = Gratë e Yllit = Women Of The Star / Women From The Star Epirus / Epir = I Epër = Upper Albania / Albanians = Al Banorë = The Dwellers Of The Star Hera = Era = Wind Apollo = Ai Prej Illit = He Is From The Star Rhea = Re = Cloud Zeus = Zëri = The Voice Pegasus = Prej Nga Zëri = Comes From The Voice Ares = Arë / Ai Rrihet = Field / He Fights Selene = Si El Hëne / Si Illi i Hënës = Like The Moon’s Star Demeter = Dimër = Winter Hestia = Vjeshta = Autumn Persephone = Porsi Prej Hëne = Just Like From The Moon Triton = Dritë = Light Thetis = Deti = Sea Fortuna = Fortuna = Storm Kronos = Krijoj = Create Amalthea = Ajo Mal Dhia = She Is A Goat From The Mountains Adamanthea = Atë E Mban Dhia = The Goat Nurses Him Cleopatra = Ka Le E Para = The First To Be Born Archimedes = Ar Ki Mendjen = Golden Minded Shall You Be Hippocrates = Hapi Krahët = Spread Your Wings Prometheus = Për Mbi Dhe = Over The Ground Herodotus = Era e Ditës = Day's Wind Aristotle = Ari Do Të Lind = Gold Shall He Born Antisthenes = Ngjan Ti Si Hëna = You Resemble The Moon Parthenon = Prej Ari, Nga Hëna Janë = They’re From The Moon, Made Of Gold Artemis = Ardhët e Mi = My Predecessors Paris = I Pari = The First Pericles = Pari Ka Le = First Born Asclepius = Ai Ka Le Prej Ujit = He Was Born From The Water Achilles = Ai Prej Qiellit = He Is From The Sky Amazon = Jam e Zonja = I Am A Strong Woman Acropolis = Ai Ka Ra Prej Illit = It Has Fallen From The Star Heracles / Hercules = Era Ka Le = The Wind Was Born Alcaeus = Ill Ky Është = He Is A Star Troy = Troja = Place Or Land Of Origin Medusa = Me Dashuri = With Love Pandora = Panë Dorën = They Saw Her Fate In Her Hand / Fortune Teller Odysseus = Udhëtues = Traveller Odessa = E Dashur = Beloved Ajax = Gjak = Blood Athena = A Ti Prej Hëne = You Are From The Moon Cassandra = Ka Sa Ëndrra = Many Dreams Penelope = Prej Hëne Lopa = Cow From The Moon Hermes = Erë Me Shi = Wind With Rain Zoe = Zonja = Lady Priam = Prijës / Pari Jam = Decedent / I Am The First Oracle Of Pythia = O Ra Ka Illi = She Fell From The Star, Pythia Delphi = Selvi / Selvia = Beautiful Woman The Whole Sentence Means: The Beautiful Woman, Pythia Fell From The Star. Alexander The Great Named Most Mountains In Asia: Tirich Mir = Ti Të Rrish Mirë = You Should Stay Well Rakaposhi = Ka Rënë Poshtë = It Fell Downwards Torabora = Tërë Borë = Full Of Snow Stok Kangri = Sa Tokë Ka Ngrirë = So Much Land Is Frozen Bubli Motin = Bubullinë Moti = Thunder Weather Ka Ra Buura = Ka Rënë Bora = Snow Has Fallen Diran = Dy Ranë / Duron = Two Fell / Withstand Ancient Egyptians Were Albanians 🇦🇱 Proof -> Pyramid = Pirg Mbi Dhe = Stack Over The Ground Cleopatra = Ka Le e Para = The First To Be Born Nefertari Meritmut = Afër Tek Ari Më Rriti Mua = Close To Gold She Raised Me Nefertiti = Afërdita = Aphrodite / Near Day / Dawn Pharaoh = Pari Ai Është / Prej Ari Ai Është = He Is The First / He Is Made Of Gold Hapi = Ha Pi = Eat Drink (Hapi Is Nile’s Other Name) Nile = Një Ill = A Star Spartans Were Albanians 🇦🇱 Proof -> Sparta = Shpatë = Sword Lycurgus = Ligji = Law Theopompus = Dheu i Popullit = Nation Land Doryssus = Dorian = Dorian Illyrian Demaratus = Dem Prej Are = Bull From The Field Klenymos = Ka Le Ndihmues = Born A Helper Cleombrotus = Ka Le Mbrojtje = Born A Shild / Born Protective Kleodaios = Ka Le i Dijes = Born All Knowing Alcamenes = Ill Ka Mendjen = His Mind Is A Star Eurykrates = E T’u Rritshin Krahët = May You Grow Big Shoulders Eurypon = E U Rritsh Prej Hëne = May You Grow From The Moon To Here Eurysthenes = E U Rritsh Sa Tek Hëna = May You Grow To The Moon Eurydamas = E U Rritsh Demi = May The Bull Grow Pausanias = Pasuria = Wealth Hippocratidas = Hapi Krahët = Spread Your Wings Hippomedon = Hap Mendjen = Think Wise Ariston = Arritur = Reached (Success) Labotas = Lindur Prej Botës = Born From Earth Anaxandridas = I Ngjan Dritës = Resembles The Light Anaxilas = I Ngjan Yjeve = Resembles The Stars Anaxander = I Ngjan Ëndrrës = Resembles A Dream Anaxidamus = I Ngjan Demit = Resembles A Bull Zeuxidamus = Zërin Si Demi = Voice Like A Bull Arehidamus = Ai Rrihet Si Demi = He Fights Like A Bull Menares = Mendo = Think Wise Polydorus = Prej Illi Dorian = Dorian From The Star Echestratus = Udhës Drejtë = The Right Way Nicomedes = Një Komb = One Nation Ancient Romans Were Albanians 🇦🇱 Proof -> Italy / Víteliú = Vijnë Tek Illi / Vijnë Nga Illi = They Come From The Star Calabria = Kala Me Brirë = Castle With Horns In Latin, Star is called Stella and Stella comes from Albanian Ill = Star Latin reads La Atin = Left The Father Luna in Latin means Moon and Luna reads in Albanian: Luan Ana = The Side Moves (Moon Phases) Hëna reads Ha Ana = The Side Eats It Up (Moon Phases) Rome reads Rrumbullak, which means Round in Albanian Primavera / Minerva = Pranvera = Spring Diana = Zana = Fairy Zana comes from Zëri = Voice Vesta reads Vjeshta = Autumn And Vjeshta comes from Albanian verb vjel = gather, pick, pluck (grapes or other fruits) Venus = Vend = Place Caelestis = Ky El Është = He Is A Star Aurora reads Ajo U Urua = She Was Blessed Faunus / Fauna = Prej Hëne = From The Moon Veni, Vidi, Vici reads Vij e Ndiej, Vij e Di, Vij e Kryej = I come and feel, I come and know, I come and finish it. Rome = Rrumbullak = Round Pompeii = Po Më Pëlqen = I Like It Pescara = Peshk = Fish Bari = Bari = Grass Brindisi = Brirë Midis = Horns Between Sicily = Si Illi = Like The Star Siculi = Si Ylli = Like The Star Sicani = Si Hëna = Like The Moon Elymians = Ylli Mbi Hënë = The Star Above The Moon Julius Ceasar = Je Illi = You Are The Star, Ca es ar = Që Është Ar = Which Is Gold

[@jamesanonymous2343]

I CAME HERE TO FIND WHY ARISTOTLE LIKED EARTH CENTERED UNIV,,,,,,,,,INSTEAD I GOT BURIED !

[@Loagun]

If you don't know that the heliocentric is the geocentric system from a different perspective then you should really not be trying to discuss this topic. (Psss the heliocentric system literally uses the measurements of the Geocentric systems. All actual real astronomers use the geocentric system because they live on earth). The Greeks probably gave up on the theory when they realized that if they're using the math and measurements from the Earth which makes up the geocentric perspective then it's exactly the same and there was no need to go through with the belief.

[@ThatOneAutisticCat]

Yay! Progress!!!!