cele Slunce (prumerna hustota):
rho = 1400.0 kg/m^3 => t_ff = 1775.96188036035 s = 29.5993646726725 min

samotne jadro Slunce:
rho = 150000.0 kg/m^3 => t_ff = 171.574217967819 s = 2.85957029946365 min

jadro Slunce v zaverecnych fazich vyvoje:
rho = 1748201.53419326 kg/m^3 => t_ff = 50.2576189331448 s

zelezny bily trpaslik:
rho = 70000000000.0 kg/m^3 => t_ff = 0.251158937746323 s
v_ff = 19907712.8007689 m/s = 0.0663590426692297 c