Both earth and moon are subjected to the gravitational force of the sun. as observed from the sun, the orbit of the moon

Options

A. will be elliptical.
B. will not be strictly elliptical because the total gravitational force on it is not central .
C. is not elliptical but will necessarily be a closed curve.
D. deviates considerably from being elliptical due to influence of planets other than earth .

Explanation

To solve the question regarding the orbit of the moon as observed from the sun, we can break it down into a series of steps:

### Step 1: Understanding the Forces Acting on the Moon
The moon is influenced by the gravitational forces of both the Earth and the Sun. As it orbits the Earth, it is also being pulled by the Sun's gravity.

**Hint:** Consider the gravitational forces acting on the moon from both the Earth and the Sun.

### Step 2: Analyzing the Nature of the Orbit
When we consider the moon's orbit from the perspective of the Sun, we need to recognize that the combined gravitational forces acting on the moon are not purely central. A central force would mean that the force acts along the line connecting the center of the moon and the center of the attracting body (in this case, the Sun).

**Hint:** Recall the definition of central forces and how they affect the shape of orbits.

### Step 3: Considering the Effects of Other Bodies
The moon's orbit is also influenced by other celestial bodies, such as other planets. These additional gravitational influences can cause deviations from a perfect elliptical orbit.

**Hint:** Think about how the presence of other planets can alter gravitational interactions.

### Step 4: Conclusion on the Shape of the Moon's Orbit
As a result of the combined gravitational forces from the Earth, the Sun, and other planets, the orbit of the moon, as observed from the Sun, will not be a perfect ellipse. Instead, it will be a closed curve that deviates from being strictly elliptical.

**Hint:** Reflect on how the principles of orbital mechanics apply when multiple gravitational forces are involved.

### Final Answer
The orbit of the moon, as observed from the Sun, will be a closed curve that deviates from being strictly elliptical due to the combined gravitational forces acting on it, which are not purely central.