mira stars造句

• Applying an empirical relation for Mira stars to ? Cygni gives a mass of . ? Cygni is losing mass at a rate of nearly each year through a stellar wind at 8.5 km / s.
• This process is predicted to happen to all Mira variables, but the relatively short duration of thermal pulses ( a few thousand years at most ) over the asymptotic giant branch lifetime of the star ( less than a million years ), means we only see it in a few of the several thousand Mira stars known, possibly in R Hydrae.