Word: planetsized
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Part of the reason is that there's not much reason for numbers that big to have names, since they're seldom used. But the scientist in Sendek is hopeful that the prefix's day might come. "We're always learning more about the universe, stars, black holes, planets and...
In his research, Kruse analyzes the magnetic fields of approximately 50,000 stars and characterizes the evolution of these fields over time. He studies these magnetic fields—which are generated by the motion of plasma inside a star—to better understand the impact they may have...
Here's the basic difference: when the planets in our solar system first formed, they were swimming through a disk-shaped cloud of gas. Their passage roiled and compressed the gas, and the gravity of the compressed gas in turn pulled on the proto-planets. The original models suggested that...
But those early models didn't take into account the fact that compressed gas heats up, which limits how dense it can become, and in turn limits how hard its gravity can pull on the proto-planets. Beyond that, the planets' own gravity would fling gas around - the same sort...
Eventually, the disk of gas dissipates, and the proto-planets are fixed in their permanent orbits. Exactly where those orbits lie depends on all sorts of factors peculiar to a given planetary system - how much material there is in the original proto-planetary disk, how much of that is dust...