These Rogue Worlds Upend the Theory of How Planets Form

A guide to the solar system's planets in 2024

NASA identifies 17 planets with possible subsurface oceans, and they could be fit for life

When Pluto was stripped of its planetary status in 2006, the 93 year old widow of Clyde Tombaugh who discovered Pluto, felt "shook up". Lowell Observatory Director preferred a rejected proposal that would have added three planets to the solar system instead of dropping Pluto