The Sun is our nearest star, just 8 light-minutes away (it takes 8 minutes for sunlight to reach us). The next closest star is a tiny red dwarf called Proxima Centauri. It sits 4.24 light-years away - meaning even at the speed of light, you’d need over four years to get there.
A light-year is the distance light travels in a year - about 5.9 trillion miles. So Proxima Centauri is roughly 25 trillion miles from us. The Voyager 1 spacecraft, the fastest object humans have ever launched out of the solar system, would take over 70,000 years to reach it at its current speed. The Parker Solar Probe, the fastest object ever, would still take more than 6,000 years.
Proxima Centauri is part of a triple-star system called Alpha Centauri. It’s a red dwarf - smaller and dimmer than our Sun - and it has at least one Earth-sized planet orbiting in its habitable zone, called Proxima Centauri b. Whether that planet has liquid water or anything alive on it, we have no idea. We probably won’t be visiting anytime soon.
