What moons in other solar systems reveal about planets like Neptune and Jupiter
- Written by Bradley Hansen, Professor of Physics and Astronomy, University of California, Los Angeles
What is the difference between a planet-satellite system as we have with the Earth and Moon, versus a binary planet – two planets orbiting each other in a cosmic do-si-do?
I am an astronomer interested in planets orbiting nearby stars, and gas giants –...
Read more: What moons in other solar systems reveal about planets like Neptune and Jupiter

