It would all depend on the "system" in question.
Star
If Jupiter was a little bigger we might have had a second star in our Solar System instead of a 5th planet.
a star is way bigger than a planet. you need a telescope to see some of the planets.a star twinkles.a planet glows.
It would make the gravity of the star have more power.As for your question, it all depends.If the planet was bigger than the star, the star would be pulled in gravatationally(if that's even a word).If the star were bigger than the planet, the planet would be pulled in.
No planet could ever come close to the size of Betelgeuse.
That star would be the sun. That's why it's a planet in our solar system.
There are no planets bigger than the sun. Even the largest planet Jupiter is only about 1% the size of the sun.
A shining star is much bigger than a planet. A star produces light and heat and other types of radiation of it's own. A planet does not.
Universe, galaxy,nebula,solar system, star, planet
There are no planets in our solar system that "could have been a star" if they had been "a little bigger".You may be referring to Jupiter; however, it would have had to be about 20 times bigger. That's like saying that a tricycle could have been a school bus if it were "a little bigger".
VV Cephei is a star system, not a planet. It is a binary star system consisting of two massive stars, one of which is a red supergiant. The system is located in the constellation Cepheus.
lots of things are bigger than a astriod ,planets, somtimes a moon, and the biggest star in are solar system.