aug 2, 2006 - Pluto is downgraded from planet to dwarf planet In August of 2006, scientists declared Pluto did not share enough traits with other planets to be considered a planet Pluto has not completed a full orbit around the sun from the time it has been discovered, to the time it was downgraded
Added to timeline:
Date:
aug 2, 2006
Now
~ 19 years ago