universe
/*"Space is big. Really big. You just won't believe how vastly hugely mindbogglingly big it is. 
I mean you may think it's a long way down the road to the chemist, but that's just peanuts to space."*/

galaxy

celestial
/*Now, this may take some explaining. A celestial is any object one may find floating in space, for any reason. 
A comet. A planet. A moon. A star. All these are celestials. The celestial datum covers all the common aspects of 
such objects (size, mass, inertia, temperature, trajectory, etc). Further objects will use this as a base object 
and build from there*/

nebula
    parent_type = /celestial

star
    parent_type = /celestial

planet
    parent_type = /celestial

moon
    parent_type = /celestial
    
comet
    parent_type = /celestial
    
asteroid
    parent_type = /celestial