Imagine being able to explore another solar system for the first time.
Scientists are planning to do just that, by sending a spacecraft the size of a mobile phone chip, a distance of 25 trillion miles!
Using today's technology it would take around 30,000 years to get to our closest star.
But they are hoping to cut the journey time to just 30 years with the help of special solar sails and a giant laser here on Earth.
Leah explains how they plan to do it.