AU. Konstantin Batygin and Michael E. Brown suggested that Planet Nine could be the core of a giant planet that was ejected from its original orbit by Jupiter during the genesis of the Solar System….Planet Nine.
| Orbital characteristics | |
|---|---|
| Mass | 6.3 +2.3 −1.5 M Earth |
| Apparent magnitude | ~21 |
Is there 8 or 9 planets?
There are eight planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Our solar system is an orderly arrangement of planets orbiting the Sun. NASA. Pluto, a dwarf planet, was classified as one of the solar system planets when it was first discovered by Clyde Tombaugh.
