4 ms·
Planet 9 should be Neptune. Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Orcus, Haumea, Makemake, Eris, etc. If you want Pluto
by SAI_Peregrinus 3y ago
Planet 9 should be Neptune.
Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Orcus, Haumea, Makemake, Eris, etc.
If you want Pluto back you have to take Charon as well! Don't discriminate, accept all the astronomical bodies in hydrostatic equilibrium orbiting the Sun!
- ben_w 3y agoWhat about Luna? The plutonic discourse aside, Earth-Moon is often described as a double-planet system.
- SAI_Peregrinus 3y agoThe barycenter of the Earth-Luna system is (currently) entirely within the Earth. So Luna is a moon. Once it's outside the radius of Earth, then it'd be a double-planet system (or a double dwarf-planet system if that nomenclature lasts).