What is the distance across our solar system in light years?

A Mon Avis: The nearest star is about 4.2 ly away. Therefore, the demarcation in-between might be imagined at about 2 ly. This is a point to ponder. Sedna might have an aphelion near 1000 AU. Planet X was detected at about 200 AU. Some comets seem to have much longer periods. Therefore, if the radius of heliosphere is changed to 1000 AU, the answer will be 0.032 ly.

The distance across our solar system is not typically measured in light years because light years are a unit of distance used to measure the vast distances between stars and galaxies. The size of the solar system is typically measured in astronomical units (AU), with 1 AU being the average distance from the Earth to the Sun, approximately 93 million miles (150 million kilometers). The outermost reaches of the solar system, including the orbit of Pluto, extend out to about 50 AU.