Some U.S. flags fly higher than others. Here are some the banners that spacecraft have carried to the far corners of the Solar System.

An American flag aboard NASA's Phoenix Mars lander. Credit: NASA/JPL-Caltech
An American flag aboard NASA's Phoenix Mars lander. Credit: NASA/JPL-Caltech
Some U.S. flags fly higher than others. Here are some the banners that spacecraft have carried to the far corners of the Solar System.