The question of "how rare is this" and a bucket list of ELWs to find has come up from time to time, so I thought I'd write one up now. I'll include some categories based on rarity, and at times, they'll be approximate.
For reference: the main star of a system is the one that's shown on the galaxy map, the first star.
Also, usually when I list a series of various things (usually stars or parents), then the first one is the most common, and the last one the least.
Let's see them then!
Common (>15%):
Uncommon (5-15%):
Rare (1-5%):
Very rare (0.025-1%):
Good F***ing Luck with These, because at best only a handful have been found (<0.025%):
If you found something that ticks more than one categories, then as a rough rule of the thumb, that pushes it lower one category at least.
As a note, Earth-like Moons (ELMs) can easily be identified by their name ending with a letter. For example, see the bolded part: "Preia Hypai SO-Q d5-4 1 f".
If you have any that I've forgotten, post them here please!
There's also a list of things not actually found yet, but maybe (maybe) possible. Even if they are, the odds would be astronomically low. Click the spoiler at your own risk, in case you'll want to find any of these.
For reference: the main star of a system is the one that's shown on the galaxy map, the first star.
Also, usually when I list a series of various things (usually stars or parents), then the first one is the most common, and the last one the least.
Let's see them then!
Common (>15%):
- system main star type: F, A, G, K
Uncommon (5-15%):
- main star type: Neutron Star
- ELW has one moon
Rare (1-5%):
- system main star type: M
- binary ELW pair
- system contains two ELWs
- ELW co-orbits two or three stars
- ringed ELW
- ELM (Earth-like Moon) with HMCP (High Metal Content Planet) parent
- ELW's moon is a candidate for terraforming
Very rare (0.025-1%):
- system main star type: B, Black Hole, Carbon star, Herbig Ae/Be, TTS (T-Tauri Star), WD (White Dwarf)
- ELW co-orbits four stars
- system contains three ELWs
- ELW has 2 moons
- ELW has thin atmospheric landable moon
- ELM with GG (Gas Giant), WW (Water World), K star, M star parent
- ELM's parent is a candidate for terraforming
- ELM has moon
- ELW has landable moon with active volcanism
- uncertain, but probably belongs here: no planets other than the ELW(s)
Good F***ing Luck with These, because at best only a handful have been found (<0.025%):
- system main star type: L, T, WR (Wolf-Rayet), O
- trinary ELW set
- binary ELM pair
- system contains four ELWs
- ELW co-orbits five or six stars
- ELW has 3-7 moons
- ELM with parent other than the ones above
- trojan ELW
- shepherd ELM (orbits ringed parent body on the inside of its rings, not outside)
- ELW has thin atmospheric landable moon with composition other than carbon dioxide or sulphur dioxide
- ELW has thin atmospheric landable moon which has surface volcanism
If you found something that ticks more than one categories, then as a rough rule of the thumb, that pushes it lower one category at least.
As a note, Earth-like Moons (ELMs) can easily be identified by their name ending with a letter. For example, see the bolded part: "Preia Hypai SO-Q d5-4 1 f".
If you have any that I've forgotten, post them here please!
There's also a list of things not actually found yet, but maybe (maybe) possible. Even if they are, the odds would be astronomically low. Click the spoiler at your own risk, in case you'll want to find any of these.
- ELW + ELM pair
- quaternary ELW set
- trinary ELM set
- system with five ELWs
- ELW co-orbits seven (or more) stars
- Y system main star (most likely impossible, habitable zone would be too close to the star)
- ELW directly orbits O star (most likely impossible, habitable zone would be too far from the star)
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