It’s possible that Earth and the other inner planets of our solar system were headed in that direction, Mickey Rosenthal, a doctoral candidate studying planet formation at the University of California, Santa Cruz, told Live Science. One theory is that the gargantuan planet Jupiter became so large that it cut off access to cosmic building blocks needed to make the inner planets bigger — effectively starving them, Rosenthal said.
No matter the reason for Earth’s current size, there’s no way to truly know what would happen to Earth if it were super. But scientists have some ideas based on what they’ve learned about our faraway cousins.
— Read on www.livescience.com/what-if-super-earth.html