Other physical changes are usually correlated with the fluctuations in brightness, such as pulsations in size, ejection of matter, and changes in spectral type, color, or temperature.
(Other physical changes; are correlated; with the fluctuations in brightness, such as pulsations in size, ejection of matter, and changes in spectral type, color, or temperature; T:usually)
Other physical changes
are correlated
with the fluctuations in brightness, such as pulsations in size, ejection of matter, and changes in spectral type, color, or temperature T:usually