How many miles wide is our solar system?

The "end" of the Oort Cloud, which is located about 2 light years from the Sun, is the point at which the Sun's gravitational pull on objects in its orbit stops, marking the "end" of our solar system. This means that the width of the solar system is approximately 4 light years, or the distance that light travels in 4 years.

The reason the number seems so huge is because you asked "in miles," and that's because light travels approximately 186 thousand (186000) miles in a second; multiply that figure by four years, and you get 23.5145 trillion miles, or 23,514,500,000,000.

Measuring from the outermost point of the Oort Cloud to the innermost boundary of the Sun's gravitational pull, the estimated breadth of our solar system is approximately 100,000 astronomical units (AU), or 9.3 billion miles (15 billion kilometers).