Boreas

The planet Boreas, is a class D ice planet, it is about 13.1 times bigger than Earth and it's gravity is about 4.08 times that of Earth. This planet is located in the Centaurus Nebula.

The planet is made up of 3 continents, which make up 63% of the planet's landmass. 1 moon orbits the planet and Boreas itself orbits a white sun in an almost perfectly circular orbit.

It's obvious life on this planet is impossible, but the planet does hold the key to whether or not life will exist on the planets around it. This planet shields some of the other planets from an asteroid field which crosses every few decades. When this happens, small pieces are scattered through this solar system, but the vast majority are caught by this planet. Those pieces that do get scattered are usually not big enough to destroy the other planets, while at the same time potentially holding the right materials or even lifeforms to begin the process of life on those other planets.