As generally described, the Space Brothers look completely human. They are reported to be various heights. They generally have light shades of hair and light-colored eyes, and act as if in the peak of health.
drinking "nectar." just like the Greek Gods
Ancient astronaut theories
"Our sun is one of a 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living thing in that enormous immensity"
Wernher Von Braun