Suppose scientists believe that they've discovered a new planet. which of the following must be true for the object they've found to qualify as a planet? a. it must be shaped like an ellipsis. b. it must have minimal gravity forces. c. it must be capable of supporting life. d. it must follow a closed orbit around a star.

The correct answer will be option-D.

Explanation:

According to the International Astronomical Union, a planet must satisfy three criteria to be a planet :

1. It must be an independent object which orbits around a star (in our cosmos-Sun).

2. It must have the mass to have its own gravity which forces it to have  

a spherical shape

3. It must be large enough to dominate its orbit as its gravity should clear away any other objects.

Thus, option-D is the correct answer.

it takes hundreds of years to become stable.

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