[punchit]

_{PLANETARY CLASSES.}

_{starfleet uses single - letter names to classify the different types of planets explored by its starships. these classifications are based on factors such as mass,  atmosphere,  surface conditions,  and the planet’s ability to support organic life.}

_{CLASS - M PLANETS.
are earth - like  —  rocky worlds with plant and animal life sustained by oxygen - nitrogen atmospheres.  most life as we know it evolved on and inhabits class - m planets.  besides earth, examples include vulcan,  risa,  and bajor.}

_{CLASS - L PLANETS.
have oxygen - argon atmospheres and plant life,  but no native animals.  humans can survive on these worlds for short periods of time.}

_{CLASS - K PLANETS.
can sustain microbial life,  but are only inhabited by complex lifeforms that rely on life - support systems and pressure domes.}

_{CLASS - H PLANETS.
covers a range of desert worlds.}

_{CLASS - J PLANETS.
gas giants,  such as jupiter and saturn.}

_{CLASS - D PLANETS.
moons or small planets with little or not atmosphere.}

_{CLASS - Y PLANETS.
used to denote worlds with harsh or toxic conditions,  which are also nicknames ‘demon’ planets.}