Although it's part of the "Encounters & Events" series, these tables aren't really encounters and events. They're settings for encounters and events. They're descriptions of planetary features. Some entries are about the physical features of the planet, some about the local species, some about social or political structures, some about the planet's usage, and so on.

Roll up or assign one or two of these for a world you're generating to give the world some character. There's a main table of 100 entries. Most entries include a d6 subtable to provide variations on the main entry.

You won't find single-biome entries like swamp planet or desert world, but you will find entries for single-use worlds, such as Hospital Planet, Grave World, or Rubbish World. Many entries could be used to describe specific regions or sites on the planet, without necessarily describing the planet as a whole, such as Military Outpost or Jump Gate.

Overall, the entries are in the low to medium range of science fiction plausibility. There are no input parameters or modifiers to let you adjust for what you've already established about a world. In effect, the tables assume you're working from a blank slate. A Garden World is as likely as Craters, and the tables don't know or care whether you're rolling up Mercury, Earth, Jupiter, or Pluto (or their equivalents elsewhere). It's fiction first, and then it's up to you to if you want to put some science-y explanations behind the results.

If that's what you're seeking, this is a good tool for the job, offering good variety on various science fiction tropes. If you're seeking a science-based method for establishing a world's characteristics or the development of life or civilizations, this isn't the tool for you.