Comment by baggy_trough
10 hours ago
The correct planet criteria are, IMHO:
- not a star
- not orbiting a planet
- roundish
- greater than 1000km radius
That would restore Pluto to its rightful place and add Eris.
10 hours ago
The correct planet criteria are, IMHO:
- not a star
- not orbiting a planet
- roundish
- greater than 1000km radius
That would restore Pluto to its rightful place and add Eris.
Why 1000 km radius? I know that 1000k diameter might be important for cold bodies to keep their equilibrium, but what does 1000km radius give?
Because honestly anybody who played stuff like KSP RSS or any space game taking place in our solar system represented at scale with adequat orbit weirdness probably told themselves "that's Pluto? Ok i get it, not a planet".
It's just a nice round number to use as a clear boundary.
Why not just have it be rounded under its own gravity? Collapse two rules into one. If nice round systems with clear boundaries is what you're going for