The orbit of the Earth is an ellipse and has two foci, one of which is located at the sun.avito009 said:If the orbit of the Earth has only one focus which is the Sun
An ellipse in three space and a geodesic in four dimensional space-time are not the same thing. There is a relationship, but it would be far better to understand the classical model first before trying to tackle the model according to general relativity.avito009 said:Does this have any relation to the fact that the smallest distance in space time is an ellipse? its not a straight line?
avito009 said:[...] then why can't it move in a circular path.
The focus of Earth's elliptical orbit is the point around which the planet revolves. In this case, the focus is the Sun.
The focus of Earth's elliptical orbit is important because it determines the shape of the planet's orbit and influences its distance from the Sun. This, in turn, affects the amount of sunlight and heat that the Earth receives, which is crucial for maintaining life on the planet.
The focus of Earth's elliptical orbit remains constant over time. However, the orientation of the orbit with respect to the Sun does change due to the gravitational pull of other planets in the solar system. This phenomenon is known as precession and occurs over a period of approximately 100,000 years.
The focus of Earth's elliptical orbit is the point around which the planet revolves, while the center of the orbit is the midpoint between the two foci (plural of focus). The distance between the focus and the center is known as the eccentricity of the orbit, which is a measure of how elliptical the orbit is.
No, the focus of Earth's elliptical orbit cannot change. The laws of physics dictate that once an object is in orbit, it will continue to move in the same path unless acted upon by an external force. Therefore, the focus of Earth's orbit will remain fixed at the Sun unless there is a significant disruption in the solar system.