Category Nuances for star_formation:

• physical,
• important,
• natural,
• astrophysical,
• complex,
• cosmic,
• evolutionary,
• basic,
• individual,
• violent,
• unknown,
• internal,
• nonlinear,
• cosmological,
• complicated,
• relevant,

Simple Categories for star_formation:

• process,
• system,
• phenomenon,