Question

A new object has been discovered in the solar system. In your own words, justify how the object can be proved to be a planet

Answer 1

How I would say an object would be called a planet is if #1, if it orbits a star, #2 if it has gravity of any kind, and #3 ( This one doesn't apply to all ) but if it has an atmosphere ( Like Venus or Jupiter )

I haven't got to astronomy​ yet but from what I know so far is stated. Hope this helped! :D

Answer 2

For an object to be considered as a planet, it must satisfy minimum three conditions:

1. The object must be round in shape.

2. The object must orbit the sun in a clear orbit.

3. The object must be biggest in its neighborhood that is it should clear its neighborhood.

For example, Pluto was once considered as planet but it was demoted to a dwarf planet when more similar objects were discovered in its neighborhood.