The sun's velocity is not actually zero. It's just that we usually take the sun as our reference point when discussing the motion of planets. This means we *consider* the sun to be stationary for the sake of simplicity.
In reality, both the sun and the planets are moving. The sun and planets are all orbiting the center of mass of the solar system, which is a point slightly outside the sun's surface. This means the sun is also moving, albeit in a smaller orbit compared to the planets.
Here's a simplified analogy:
Imagine a large, heavy ball (the sun) and a smaller ball (a planet) connected by a string. When the smaller ball spins around the larger ball, the larger ball also moves slightly. This is because the smaller ball pulls on the larger ball, causing it to move.
Key points:
* Center of mass: The center of mass of the solar system is the point around which all objects in the solar system orbit.
* Relative motion: The apparent motion of the sun and planets depends on the reference point. When we take the sun as the reference point, it appears stationary.
* Gravitational influence: The gravitational pull between the sun and planets causes both to move.
So, while we might say the sun is stationary for ease of understanding, it's essential to remember that the sun is actually moving around the center of mass of the solar system.
