Astrophysics: Binary Star System (6 of 40) What is the Barycenter?
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- Опубліковано 11 жов 2024
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In this video I will explain what is a barycenter and its effects on moons, asteroids, planets, and suns.
Next video in this series can be found at:
That was smooth unlike typical prof.
Orbital motion of 2 or more masses around a Barycenter indicates that Barycenter exerts pull force on the orbiting masses. Fixed positron of Barycenter b/w 2 masses proves that force exerted by Barycenter on both masses is equal. Centripetal force exerted by Barycenter is equal to centrifugal force given by formula mw2r.
m = mass of object
w2 = sq. of angular velocity
r = distance of mass from Barycenter.
Since both mass orbiting the Barycenter have equal angular velocity we can write the following equation;
m1 r1 =m2 r2. This equation is same as in your video 8 of 40.
Thank you so much I had the hardest time trying to explain this to someone and also explained that it might help with the understanding of the rotation of galaxies with relation to the Barrett Center of the Galaxy and all the objects orbiting the center and all those objects have a very center shared with other objects, I would imagine this makes things look weird when looking at the rotation of galaxies and may help in a small way with dark matter ideas.
Glad it helped!
Excellent presentation. Thanks
Glad it was helpful!
Great as always. When you measured the distance from the earth to the moon is it from the surfaces of each or the centers of each?
Distances between astronomical bodies are always from center to center.
Very good
Hey, for two objects of same mass kept at a certain distance from each other and considering origin as exact mid point between those objects, shouldn’t the Barycenter be Zero?
Saying that the barycenter "is zero" may be misleading. Saying it is at the origin or half-way in between the two objects is better.
@@MichelvanBiezen Thanks
The value we got from the formula indicates what? Is the barycenter 4675 km away from Moon? Earth? Or the origin?
From the center of the Earth.
@@MichelvanBiezen what if the origin was on the centre of moon or between Earth and Moon
If you place the Moon at the origin and the Earth 385,000 km away on the x-axis, the barycenter would again appear at a distance of 4675 km from the center of the Earth when you calculate it. Try it and see what happens.
@@MichelvanBiezen Thanks
I was taught that r1 = a/1+m1/m2 is the formula needed to work out where the barycentre is?
It is better to learn how to derive the formula and what assumptions were made when you are given a formula such as the one you mentioned.
Thanks man you rock!
Thank You sir.
Welcome!! 🙂
Yay!
Thanks you
Would things begin to levitate if the barycenter of the earth and moon was a few meters above ground level?
No, it would just affect the oscillating motion of the Earth and the Moon.
Ok, so the barycenter is the center of rotation, got it. Would things begin to levitate if a centre of gravity or lagrange point was a few meters above ground level?
The Lagrange points are potential wells, which means things fall into it and do not get out unless they have sufficient velocity. Lagrange points are found on the orbit of planets 60 degrees away from the planet as well as far above and below the planet. It is not conceivable for them to be close to the planet.
Why 60° and why is it inconceivable to have Ln very close to either body?
Apologies if this is already explained later on.
Sir I Have a Doubt , is The earths Mass 5.98 or 5.94
It is 5.98 x 10^24 kg
OK Sir thanks
Is there a role of gravity or any other forces at the point of Barycentre ?
If you throw a stick, it will rotate around its center of mass, and the center of mass will move as a projectile in a parabolic path. You can think of that center of mass as the "barycenter".
Dankeschön für dieses Video #Barycenter
Good
Thanks
Why the distance of earth and sun is varying? Why some days earth is more close/ far? If those are rotating Barycenter, then the distance must be constant , ?!?
The Earth has an elliptical orbit.
@@MichelvanBiezen yes, and you said it because of the Barycenter of earth and sun, Barycenter never changes so, the distance of earth and sun must same.
@@abhilashp1448 The barycenter doesn't have to change for the distance to change. Like he said, the Earth has an elliptical orbit around the Sun-Earth Barycenter..
Abhilash p if the distances of the earth and sun change that doesn’t mean the barycenter has to change. The barycenter itself regulates those distances. If, let’s say, the earth was at periapsis, then the sun would be slightly further away from the barycenter to keep said barycenter true
@@dime8932 So the barycenter essentially adjusts the distances so as to remain a constant like the speed of light in vacuum remains a constant by adjusting other parameters like length and time?
Thank
You are welcome.
Can same thing is true for atomic level too?
At the atomic level other forces are at play.
what about barycenter of black hole?
What would you like to know? ("What about?" is not a definitive question)
Michel van Biezen where is barycenter at black hole? is there one?
Andriy Sopilniak binary black holes? 20 and 30 solar masses
You can think of a black hole as an object with mass (just like any other object) and use the same equation (placing the black hole on the origin) to find the barycenter of it and another star or another black hole.
Michel van Biezen thank you