by John Swanson
Copyright ©2016 Puzzles with a Purpose. All rights reserved.
According to established theory, no new planets have formed in the Solar System for the past 4.6 billion (or so) years. Yet, over the past couple of millennia man's knowledge and definitions have resulted in changes to the number of solar objects called planets.
concepts of the period, how many planets were
there and what were their names in each of the
following years (CE):
Take ten points for every correct answer and an additional point for the name of each solar object you can name that has been deemed a planet.
GO TO SOLUTION PAGE