Was discovered on March 12, 1930. There is much about Pluto that is not yet known simply because there has not been enough time to study it. All the other planets have had hundreds of years of study. Thus far, we have only been able to study and observe Pluto as it has moved through the constellations of Cancer, Leo, Virgo, Libra, Scorpio and now Sagittarius.
Pluto moved into the constellation of Sagittarius in November of 1995. It takes Pluto 248 years to travel through all twelve constellations and stays in one sign from 14 to 30 years. Pluto travels from 0 degrees to 3 minutes a day depending on whether it is in retrograde or direct motion. One thing we do know about Pluto is that it is the great transformer. It breaks down the old, and replaces it with the new.