Does anyone can answer my questions?

[mayurr12]

if a planet revolves around a star in an ellipticle orbit and the position of star changes from one focus of ellipse to another then what happens to the angular velocity of planet(direction, sense of revolution )

 

[Astronuc]

Is the change instantaneous or over a period of time?

Switching the stars mass from one focus to the other would certainly change the orbital dynamics, depending on when the change occurred.

The direction of revolution would not change, but the dynamics have to change, e.g. if the planet was in periapsis (or perihelion) and the star was moved to the other focus (toward apoapsis), then the planet would necessarily do what? Similarly, what if the planet was at apoapsis and the star move to the other focus?

 

[m2003]

I cannot provide a definitive answer without more information and context. However, I can offer some insights and considerations that may help in understanding the situation.

Firstly, the angular velocity of a planet refers to the rate at which it rotates or revolves around its axis. This is typically measured in degrees per unit of time, such as degrees per day or degrees per year. Therefore, the angular velocity of a planet would not be affected by the position of the star in its orbit.

However, the orbital velocity of the planet around the star may be affected by the changing position of the star. Orbital velocity refers to the speed at which a planet moves around its star in its elliptical orbit. As the star moves from one focus of the ellipse to the other, the distance between the star and the planet will change, which can impact the orbital velocity of the planet.

In terms of direction and sense of revolution, these are also influenced by the position of the star in the orbit. The direction of revolution refers to the direction in which the planet moves around the star, while the sense of revolution refers to the orientation of the planet's orbit in relation to the star's position. Both of these factors can change as the position of the star shifts within the orbit.

Overall, the changing position of the star within the elliptical orbit can have various effects on the planet's orbital dynamics, including its orbital velocity, direction, and sense of revolution. However, the specifics of these changes would depend on the specific characteristics of the planet and its orbit, as well as the properties of the star.