This is a fun thought experiment! Here's how we can figure this out:

1. Size Comparisons:

* Sun: The Sun's diameter is about 865,000 miles (1.39 million kilometers).

* Beach Ball: Let's say a typical beach ball has a diameter of 1 foot (0.3 meters).

* Pluto: Pluto's diameter is about 1,473 miles (2,370 kilometers).

2. Scaling Down the Sun:

We need to figure out how much smaller the Sun would be if it were the size of a beach ball. Divide the Sun's diameter by the beach ball's diameter:

865,000 miles / 1 foot = 10,380,000 feet (approximately)

This means the Sun would be shrunk down by a factor of about 10,380,000.

3. Scaling Down Pluto:

Now, let's scale down Pluto by the same factor:

1,473 miles / 10,380,000 = 0.000142 miles (approximately)

Convert this to a more relatable unit, like inches:

0.000142 miles * 5,280 feet/mile * 12 inches/foot = 0.09 inches

Conclusion:

If the Sun were the size of a beach ball, Pluto would be about 0.09 inches in diameter, which is slightly smaller than the width of a typical pencil lead!