What is the nearest star to the earth?

One of the closest stars to our solar system (except the sun) is called proxima centauri, which is located in Centauri, 4.22 light years away from the sun. Light-year is an astronomical distance unit, which refers to the distance traveled by light in one year, which is about 9,460.5 billion kilometers. 4.22 light years is equivalent to 399.233 billion kilometers. So far, the fastest spaceship launched by human beings is Voyager, with a speed of 52,000 kilometers per hour. If we want to go to proxima centauri by Voyager, it will take 6.5438+0.7 million years to go back and forth. With our short life, it is impossible to realize this wish at present. The universe is big, though it is near.