Ancient Greek Astronomy
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- Опубликовано: 10 окт 2017
- How the ancient Greeks understood the universe; what they got right and what they got wrong. How Aristotle understood the Earth was round by observing lunar eclipses; how Aristarchus of Samos used these results to work out the relative sizes of Earth, the Sun, and Moon, how Eratosthenes of Cyrene measured Earth's circumference, and how Hipparchus of Nicaea determined created the first catalog of stars and discovered Earth's 26,000 year axial precession, Finally, we take a look at Claudius Ptolemy's collection of works in the Almagest, and how he came up with a system of epicycles to explain planets' retrograde motion.
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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!
Yay! Progress!!!!
Lol
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."
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.
@@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.
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.
Thank you so much for those kind words, I truly appreciate it!
@@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
Thank you, Ian 😊
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
Dude this video is great. Wish there was more of this.
This was such a fun video, I hope you still make videos like these, I learned a lot
Thanks! I've made a few others since this one.
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.
Fantastic, I'm glad it helped. Thanks so much for letting me know!
Excellent video. Great explanations of the concepts involved.
Thanks, Retrograde!
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.
Thanks. Thought about going there with the trig but wanted to keep it at the 101 level.
Great video!!! Well done sir, well done!
Thank you!
I absolutely love this stuff
I fell in love with you at around 1:40 with that flat earth joke
lol, thanks!
hahahaha
Beautiful work
Great great summary video
Glad you liked it!
jeez this helped me so much. thanks
I'm glad you found it helpful. Cheers!
awesome video, thanks
My pleasure, I'm glad you liked it!
Thank you. Nice Information
My pleasure. Thanks for stopping by!
I am working on interpreting this to spanish, for personal use, and its kicking my ass. Thanks for the video.
Aristotle's haircut is dope. Hhaha
Thanks for video. Your video was shown in our class this morning. Just doing a review
Glad you liked it! Aristotle was pretty jacked as well. The dude lifted.
I have liked the video now & watch it later because undobtly ancient technology was great.
Best explaination ❤️
This video is informative
Super
Thanks.
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?
Wasn’t it Eudoxus of Knidus, almost 4 centuries before who proposed an explanation to retrograde motion ?
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?
What can you not verify? Everything can be looked up yourself.
Eratosthenes was one hell of a genius .
For real (if he was still alive to this very day flat-earthers would yell at him
Imagine if the star parralax thing was visible the whole history would have been different.
So would the entire universe, since everything would be a whole lot closer :)
Great video!
Superb work!
Thank you!
I did not know this
Very helpful!!! thank you
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?
Not all , anything that went against the teachings of religion wasn’t talked about as openly
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?
It was burnt twice
Nise
The idea that anyone today believes that the earth is flat is also BS.
Ha ha says someone who thinks spinning around a vacuum of space at 66666mph, whilst rotating at 1k mph 🙄 🤣 😀
@@darrenenright1728because we are
@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!
15:15
Erastosthenes of Cyrene wasn’t the first to calculate the earths circumference, not even close
It's important to be clear the Earth's shadow only crosses the moon only during eclipses and not during normal lunar cycles.
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 !
i using this to teach
Daniel Requejo, you’re teaching misinformation...
Daniel Requejo, use your own works and convictions to teach !
Yooooooooooooooo!
Where is the second part of this video?
Skipping past Thales and Anaximander...
before aristotle, Valmiki wrote ramayana and described our sky very accurately. Indians knew about astrophysics before aristotle and all.
Is this a Evolution of ancient Greek astronomy?
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
Jupiter = Zeus Pater ( God + Father )
Zeus = Deus , Dios Dio
Sphere, like a globe, not round like a pancake. 3D not 2D, X, Y, Z, not X, Y.
Imagine using math, current data, and recorded history at the same time to come up with current knowledge….
What about Anaximander and the Central Fire. Was he not Greek?
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.
Thanks. I recreated the epicycle animation in Keynote, since that's what I use when I teach my classes.
thought the Earth was a sphere. Wording is important for the right meaning.
May i dubbed your video in Bangla?
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.
Ptolemy is and was right. Ever heard of the the Golden ratio. It's in everything. Why would as above be any different??
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.
Geocentric!
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.
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.
What about the south shaft. That's suposts be Isis. Don't talk bout that huh?
O
ancient greek would not be called greek
They'd call it chatting.
I was into this, until you went "south of the south pole" lol
sorry, very confusing for us simples
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.
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.
You may find it helpful to check out my previous videos in this series where I set up some of the topics referenced here: ruclips.net/video/i2e0aRtwsCY/видео.html
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
I CAME HERE TO FIND WHY ARISTOTLE LIKED EARTH CENTERED UNIV,,,,,,,,,INSTEAD I GOT BURIED !
Yay! Progress!!!!