One of the brightest stars in our galaxy, AG Carinae is a stellar monster fighting a tug-of-war between its outward radiation pressure and the inward pull of gravity to avoid self-destruction. Located 20,000 light-years away in our Milky Way Galaxy, this star is a few million years old and surrounded by an expanding shell of gas and dust nearly five light-years wide. This vast celestial structure formed from one or more massive eruptions around 10,000 years ago, blowing the stars' outer layers i