Take 165 years for Neptune to travel around the Sun. So generation of persons born Scorpio in Neptune. Next sign to go into Neptune is Sagittarius. In 2011 Neptune completed its orbit of the Sun since it discovery in It has 13 moons and 6 rings.
The exploration of Mars is the study of Mars by spacecraft. Probes sent from Earth, beginning in the late century, have yielded a dramatic increase in knowledge about the Martian system, focused primarily on understanding its geology and habitability