Researchers have now shown that there are in fact four types of planetary systems ... to increase with distance from the star – just as in our solar system. If, on the other hand, the mass ...

A planetary system is shaped at the boundary of order and chaos. It starts out as a molecular cloud—a big, cold clump of mostly hydrogen gas that can collapse to make stars. As central stars ...

Barnard’s Star, discovered by American astronomer E.E. Barnard in 1916, is a low-mass red dwarf, one of the most common types of ... to our solar system, each of the four planets are inside ...

If the small planets within a system are close to the star and massive planets further ... have now shown for the first time that there are in fact four types of planetary systems.