It is the largest star currently known, a red hypergiant. Its density is very low, so its not the most massive, but ii has the largest diameter, around 1800 to 2100 solar radii (its radius is...
There's a medium sized star at the center, and some rocks and dust orbiting the star. It's mostly empty space. Some of the bigger rocks and grains of dust are called "planets", and one of them is...
There would be no solar system. Every object in space has a gravitational pull. An example would be if you place two dice in space and place them a few meters apart in time the two dice would...