If the earth is one half its present distance from the sun. How many days will be presents one year on the surface of earth will change?

Explanation

To solve the problem of how many days will be in a year if the Earth is at half its present distance from the Sun, we can use Kepler's Third Law of Planetary Motion. Here’s a step-by-step solution:

### Step 1: Understand the Problem
We need to determine the new length of a year (T2) when the Earth's distance from the Sun is halved (R2 = R/2). We know that the current length of a year (T1) is 365 days.

### Step 2: Apply Kepler's Third Law
Kepler's Third Law states that the square of the orbital period (T) of a planet is directly proportional to the cube of the semi-major axis (R) of its orbit:
\[ T^2 \propto R^3 \]
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