It shines (it generates light).
The defining characteristic of a main sequence star burns hydrogen to helium in its core.
brightness
The mass of the star.
the special characteristic of starfish are they have an Exoskeleton and Radial symmetry
tae pangit
By their size, distance, and temperature
help me
mass
The colour of the star is determined by its age , mass , and composition.
Red super giant.
They analyze the star's spectrum. Each element produces characteristic lines in a spectrum.
I think the characteristic common to every star is nuclear fusion in its core, either now or at some time in the past.