Planet Ranks

BACKSTORY
Planet Ranks are ranks to rank planets into the categories so it can help scientists know what type they are,

Planet Ranks were created by space agency: Galaverse, Galaverse was recently created in 2057 January 11th they made custom space probes and sent it into space they also collaborated with NASA. NASA and Galaverse officially stated that planet ranks are now a thing.

RANKS
Rank A: Rank A planets are recently created planets it depends on their age and the solidity of their cores

Rank B: Rank B planets are actually planetoids and moons, and or asteroids. this class is to rank Smallish Medium planets.

Rank C, D, E: Are planets close to the size of venus and earth but have deadly gasses in the atmosphere and are supremely cold that it will freeze you to death instantly, they also orbit no stars so they move around space.

Rank F, G: Are basically earth-sized planets and have the same atmosphere as earth and will be habitable on

Rank H, I: Are terra's with life but the atmosphere is not the same as earth and are very hot.

Rank J: Rank J planets are Gas Giants and Gas Supergiants.

Rank K, L: Class K planets are barren worlds with no native life. They do not possess breathable atmospheres but have reasonably tolerable gravity, thus planets such as mars can be colonized with atmospheric domes. However, through terraforming, they can be made into Rank F, G worlds.

Rank M, N: Rank N, M's are just Oceania's no islands just ocean.

Rank O: Rank O's are Planets that change environments continuously because there caused by peculiar orbits, an orbit around a variable output star, or some other factor which causes conditions to drastically change over time

Rank Q: Are supposed to be Small gas giants it's smaller than Rank J

Rank R: Rank R's are planets that have alien life species, such as purple colour

alien plants and humanoid aliens

Rank S: Rank S's are planets that have endless swamps with short oceans they have really hot temperatures and may have alien plants on there.

Rank T, U, Y, Z: These Rank type planets are referred to as "demon" worlds, where surface conditions do not fall into any other recognized category. Such worlds are usually hostile and lethal to humanoid life. If life forms develop on these worlds they usually take on many bizarre forms, like living crystal or rock, liquid or gaseous physical states.