I’m curious to know how long it takes for light to travel from the sun to Neptune. As I understand it, light travels at a speed of 186,000 miles per second. That means that it takes light around 4 hours and 10 minutes to travel from the sun to Earth. But Neptune is much farther away than Earth, so I’m wondering how long it takes for light to reach it. Does anyone know how long it takes for light to travel from the sun to Neptune? Any help or insight would be greatly appreciated.