When Pluto was discovered by Clyde Tombaugh in ... because it excludes exoplanets," or planets discovered beyond our solar system, Jean-Luc Margot, a planetary scientist at UCLA, told Live Science.
This means that Pluto is not a planet, but a dwarf planet. In our solar system, there are five dwarf planets: Ceres, Haumea, Makemake, Eris and of course, Pluto. So, what does it mean to ‘clear ...
How many planets are there in our solar system? Nine? Eight? Twelve? Hundreds? I know many will insist there are nine, with Pluto as the ninth planet, but ...