Precession Of The Equinoxes And The Changes Of The Polar Star
Ғылым және технология
Practically at the centre of that whirlwind drawn by the movement of the celestial vault is the most famous of all the stars, the North Star, or Polaris, as it is also called in Latin starting from the 18th century.
And it is because of this peculiarity that Polaris has become the symbol of the cardinal point par excellence, that of the North direction;
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The men of our time have lived or live in a world where since they were born there has existed only one "polar star", the one that identifies the end of the tail of the Lesser Bear and which in Latin is called Alpha Ursae Minoris. But it has not always been so. The Earth's axis of rotation, in fact, while maintaining the same inclination to the ecliptic, does not always point in the same direction, but like a spinning top that cannot keep vertical, and begins to oscillate slowly describing with its axis an inverted cone, so the Earth's axis during a cycle almost 26,000 years long draws in the sky a circle of radius equal to the angle of inclination, or 23.5°. This circle crosses the circumpolar constellation, bringing ever-changing stars closer in time.
It is therefore only by pure chance that in this historical period it is the Alpha Ursa Minoris star that is prospectively very close to the celestial Pole. In fact, it was only from the end of the 12th century that Alpha Ursae Minoris began to be referred to as the "polar star"... polar star.
This astronomical curiosity, which in astronomy is called "Precession of the equinoxes", can allow us to establish a parallel between what was happening in the sky and what was happening on Earth in the last 26,000 years, and to relate the alternation of the different "polar stars" with human events.
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Video Chapters:
00:00 Introduction
01:20 Historical Context
02:28 Precession of the Equinoxes
06:42 Alderamin
09:45 Nearest Star
11:35 Alpha of the Dragon
#insanecuriosity #equinoxes #polarstar
Пікірлер: 40
Great information on our universe !
@insanecuriosity2682
3 жыл бұрын
Thank you!!
Over the summer, I got into astrophotography, and it requires you to 'polar align' so for a long long time, I was under the very wrong assumption that Polaris is the brightest star in the sky. Never really paying attention to which one was polaris or not. I just saw a bright stay and figure "hey that must be polaris..." oh how wrong I was. In my area, in a pretty light filled sky Polaris is actually darn dim. Compared to the bigger hotter stars, it's not easy to find. ( I had to buy a literal compass to make sure I was pointed in the right direction...) Anyway figured I'd share, great video!!
Love you man!
@insanecuriosity2682
3 жыл бұрын
We feel the same for our amazing community! Thanks for watching!
Idk how you can do all this rich content on a daily basis. The only thing is that since I've started following your channel I'm more and more interested in space exploration
@insanecuriosity2682
3 жыл бұрын
We have a great team behind scenes doing our very best! Glad to see it is working and it can get to inspire people to learn more! Thanks for watching Flavio
I remember looking at projections of changes to the constellations and how they have and will change with the movement of the stars. Are those movements being accounted for here or is this just an ellipse drawn on the present sky?
I couldn't find yesterday's post. Felt lost the whole day! 😥 But now... 😀
@insanecuriosity2682
3 жыл бұрын
Here we are! ;)
@MG-er6dm
3 жыл бұрын
@@insanecuriosity2682 l understand - after all, it is the Christmas season! 🤔
Can someone on the team hang out a "no fishing" sign! 🚫
Do stars really twinkle to dust between us and them??
@insanecuriosity2682
3 жыл бұрын
Not exactly because Stars are not solid! Think you might find interesting this link talking about Stars twinkling! earthsky.org/space/why-dont-planets-twinkle-as-stars-do#:~:text=Stars%20twinkle%20because%20%E2%80%A6%20they're,pinpoint%20light%20of%20a%20star.&text=You%20can%20see%20planets%20as,telescope%2C%20while%20stars%20remain%20pinpoints. Hope you fin it useful! Thanks for watching and being Curious with us!
But is this right to use as this assuming the tilt is same but it changes over few thousand years?
Wow I’m seeing stars ⭐️
@insanecuriosity2682
3 жыл бұрын
Hey Jose! Good to confirm that again, missed having you around!
Best video for falling a sleep in a good way, very sooting voice. thank you.
@insanecuriosity2682
3 жыл бұрын
Great to hear!! Thank you for watching! First time?
do some videos about software engineering
@insanecuriosity2682
3 жыл бұрын
Hmm..Can you give an example of a title?
Vibes of cosmos
If I may give my opinion regarding the representation of the Neanderthals: it's very condescending to picture them as grotesquely, clumsy and with few less intellectual capabilities than ourselves. If evidence is necessary, and as an example or as a complete axiomatic proof ( maybe is too Much!) it's to notice their ability creating pictures, weapons, rituals and social way of living I think you can see they're very capable beings. If you just imagine the impressive imagination, creativity and planning ability within a drawing in a dark cave, limited to the materials of the time, and you marvel with the beauty, commitment and perfection of the paintings(p.eg) I'm certain and have the audacity to say that it equals or surpasses a Michelangelo's Cistine Chapel! But this is just my humble opinion... Nb not a criticism just an observation. Congratulations on your work!
I wish the images in this channel's videos actually corresponded to the script and didn't contain so much embellishment and misinformation. It would also help if the narrator had a working knowledge of the words he was reading. The tropics they choose are often very interesting, is just too bad they make such poor videos.
@RodriguezCarlitos-hd7ti
3 ай бұрын
Amen! You took the words out of my mouth!
After what it's been discovered in various archeological sites (some older than 12000 years) I wonder if it was Sumer people that "invented" written language. Maybe we found out that they were the first, because their writing, was in the form of clay tablets, and does not suffer much destruction neither wear nor tear. Who knows if before they, there wasn't another people who wrote in another kind of material (animal skins, tree bark or even a rudimentary paper), that did not reach the present day? We know that the library of Alexandria was consumed by fire, destroying countless books and immense information that never reached us, perhaps they did the same with the wisdom of these "ancient people". Because unfortunately history is written (tampered, adapted and rewritten) by the winners...If so how many centuries of knowledge we could have and Humanity at 2022 would've send a spaceship to Colonize Alpha Centaury and beyond( But first take care of their own Problems back at Home: Hunger, War, Disease, Climate Control or 100% technology to produce energy with 0% emissions, conflicts between religions, resources and wipe out greed, envy, And instead of Woken State embarking on uniting to Wake Up the States!)
Wot happens when we get to the age of Leo
So there was no study of astronomy outside Asia Minor and Egypt! The Indians and Chinese didn't know anything. They all went to Asia Minor and Egypt for education 3-4k years ago! The makers of this clip need to go back to primary school.
For some reason when discission of old civilization comes up, PERSIAN civilization and its contributiobservation is ignored or is substituted with Arabic culture many centuries later!!!!!
Sorry but the 0uctures n words don't match at all. You need to change your presentation.... Simple rough sketch editor have done better than the compiled confusion!
Huh
What they have identified, is not the North star.
@MG-er6dm
3 жыл бұрын
More please. I'm curious! 🤔
@johncass3641
3 жыл бұрын
@@MG-er6dm I am going to admit to my error. They were talking about the little dipper and I thought they were talking about the big dipper. My bad...
@MG-er6dm
3 жыл бұрын
@@johncass3641 That's cool John. I know you know alot more than me by what you just said. I stand suitably impressed.
There is nothing about Asia in European history 😂😂
@allyvelly
Жыл бұрын
Odin the god has Turkic roots.
There is no actual evidence that Polaris was or will ever not be the pole star.