Because the Sun is so far away from the Earth, it takes Sunlight about 8 minutes and 20 seconds to reach us from the surface of the Sun. But, for this light to reach the Sun's surface from its core may take thousands of years!
The distance from the Sun's core to its surface is much shorter than the distance from its surface to the Earth. So, it takes light more time to travel a shorter distance. Want to know why? Finish this module and we will tell you!