Question

earlier it was the solar system has nine planet but now it is said that solar system has got only eight planets justify ​

Answer 1

Answer:

as one planet named Pluto was lost or destroyed .Only 8 planets were left in the solar system

Answer 2

Earlier it was told the solar system has nine planet but now it is said that solar system has got only eight planets because Pluto is considered as the Dwarf Planet.

• Justification:  

1. Definition: Dwarf planet is a planetary mass object that does not dominate its region of space.
2. It has no satellite.
3. It has a direct orbit around the Sun and it is massive enough to be plastic – for its gravity to maintain its shape.