A planet was, in human terms, a celestial body orbiting a star or stellar remnant that was massive enough to be rounded by its own gravity, was not massive enough to cause thermonuclear fusion, and had cleared its neighbouring region of planetesimals.
Types of Planets[edit | edit source]
Earth-like planets[edit | edit source]
Planets formed the main habitat for essentially all lifeforms known to man, and for all the intelligent species known to man. Humans were able to settle on a number of worlds more or less similar to their original homeworld, Earth. In some cases, like Grayson, San Martin, Meyerdahl, or the two Mfecane worlds, a certain degree of genetic manipulation of either the population or the environment was necessary to make the planet in question livable. (HH2)
Gas giants[edit | edit source]
List of planets[edit | edit source]
References[edit | edit source]
- Solid objects thought to exist in protoplanetary disks and in debris disks.