Retrograde Motion

I'm studying an astronomy elective course in university and I gotta say that this is really helpful

Amazing! This needs more views

Waning and waxing phases of venus... Dose it have any significance in our horoscope ?

As for the mechanical devices.. Could u at least indicate which is Earth and which is Mars for better clarification and visual aids.. And moving from left to right is moving westwards instead of eastwards isn't it? I'm bit confused here! 😢

I've watched a lot of vids but this was the only vid I understand clearly

👌👌👌

Another bullshit brainwash. We are not looking at giant mirror on earth that we are looking from them stars. We are on earth and we are looking at Mars.. And this motion is IMPOSSIBLE on Heliocentric Model. Any scientists welcome to debate

"Largely correct" 🤣

The model of Ptolemy evolved over time to incorporate at least 17 epicycles (circles within circles) and it became very complex to analyze by the 1500s. It gave more accurate predictions for planetary positions than the heliocentric theory proposed by Copernicus. But it was the sheer simplicity of the heliocentric model that won over the natural scientists of the day. There was nothing wrong with the Ptolemy model - it was not meant to be a physical theory of cause and effect, like Newton's theory of gravitation which resulted in the prediction that planets would move in elliptical orbits. But it was simply a tool for calculating the positions of planets from the perspective of the Earth (a natural, if unfortunate, choice). The heliocentric theory, likewise, was not a physical theory, but a description of motion of the planets from the perspective of the Sun. It was much simpler to describe due to the much greater mass of the Sun compared to any of the planets, hence it was essentially a center of mass of the solar system description, a description of motion that is simpler to describe.

Perfect explanation.

Who's here After watching the Anime called Orb: on the movement of the earth

In hindsight tell all the silly girls on TikTok that this what retrograde actually means. Being a good person and treating people right comes from the heart, not costar

Excellent explanation, big thank you!

Very interesting, so I am guessing it's kind of similar to how we think that other vehicles are going backwards when we overtake them, except the effect is caused because apparent position of the planet is different from what it actually is, all a matter of perspective

Using a stationary earth to show the actual observations of retrograde proves that Earth is stationary. Try doing the mechanical retrograde on a model on which Earth moves and you will see that Mars retrograde observations do not align with the moving earth model.

Three body problem?

I racked my brains forever thinking about why this happened, until I realized that the movement is only retrograde to the background stars - not local midnight.

Excellent explanation. These times and angles are averages. Thanks to stellarium's ephemeris tool, I noted vast discrepancies with Mars. During favorable oppositions when its closest to the sun in its orbit, retrograde time can be as short as 59 days and as great as 81 during "far" oppositions. I'm guessing its span is affected by its orbital speed. Favorable oppositions (July-Oct) when Mars is moving faster and closer to the orbital speed of Earth have 10 degree loops while unfavorable ones (Jan-April) where Mars is slow and far, we whiz by and it has loops as big as 19.5 degrees. Only elliptical Mercury has a similar effect of spans vastly varying. Her method is very accurate for more circular orbits such as Jupiter, where I found a period at 116-125 days with no span changes.

Indian Vedic Astrology has explained this thousands of years ago.

Retrograde is what we observe when we ride the "spinning tea cups" at an amusement park. It's a "real" phenomena, when both the observer and observed are both in motion.

Geocentric is not "wrong" and the heliocentric model is not "right". They are different models, more or less complicated and more or less predictive.

Funny how the visualization they use represents Ptolemy's geocentric model..

distance in space is so cool

Is there any software available to see the movement of other planets seen from the earth. (the top view)

And then some muslims use this to show that the earth will turn magically for the sun to rise from the west

The video is amazing. Great job and thank you. The only improvement I can think of would be a tiny camera on the earth ball that would show Mars against the changing background. But that would be tricky.

"completely wrong"? the "ptolomy" system explains retrogression as an artifact of the planets simultaneous apparent orbit of the earth and actual orbit of the sun. how is this "completely wrong"?

Absolutely great video. However I looked many times at the last graph and still don’t get it. Why are the t=121 days positions of Earth, Mars and Jupiter projected as the position on the celestial sphere at t=0 days? It just doesn’t make sense to me. What’s the explanation or is this a mistake?

210 degree, retro takes place for outmost planets.

Why Does mars takes longer time to retrograde than the other outer planets?

I got the answer right. Even tho it wasn’t because the same reason but I’m so happy and glad I got it and understand it 🎉🎉😊💜

I'm with Ptolemy on this one.

👌👌 🇧🇩

Good explanation

I finally get it, thank you! 🪐

Great demonstration!

In science we dont say "its completely wrong"
we only say - "its not aligned with currently accepted scientific model"

There is no right vs wrong here - because its a model - projected by keeping earth into as epicenter.

As we know that sun is also a moving object.
It model purely depends on what we keeps as center to the frame of reference.

In astronomy proving Heliocentric model as true is not the same thing as proving earth is geospherical. Because former is a model and latter is oberjective fact.

Think it deeper.

Both model can be true at the same time based on different fame-of-reference, because there is no such thing as "objectively known corners of the universe"

Or may be I am being more philosophical here.😅

I'm here because someone on Twitter suggested I watch this to prove the Earth isn't flat. I would have to agree with them. Flat Earth is a farce.

Excellent demonstration.

This demonstrates once again that the Earth is not fixed as Flat Earth-ers sustain.

Unfortunately, this explanation for the observed retrogrades of our planets does not stand up to close scrutiny. Mars, for instance, is actually observed to retrograde for less time (61 days) and width during its CLOSEST passages to Earth (approx. 0.37AU) - and for more time (83 days) and width during its FURTHEST passages to Earth (approx. 0.67AU). This is contrary to the most basic laws of perspective - as thoroughly expounded and illustrated in my book "The TYCHOS - Our Geoaxial Binary System" (2022).

Did anyone of us imagine how the sun is gonna rise from the west as said by our prophet Muhammad (peace be upon him) 1400 yrs ago..

but now scientists found how it happens..scientists were making researches on MARS for long time....MARS which rotates in the same direction of the EARTH has now started to rotate in the opposite direction...now the sun rises from west in MARS..this is named as RETROGRADE MOTION...and this happens to all planets..amazingly EARTH is next

Great explanation!

Thank you so much, such a great explanation ❤️
Very helpful for my astronomy olympiad

😡

good video thanks for sharing..

Thank you for finally helping me understand. I think maybe it 85% make sense to me now which is SO much more progress than I've made with other videos / explanations!