The mighty blue giant AG Carinae is not your normal star. One of the brightest stars in our Milky Way galaxy, AG Carinae is 70 times more massive than the Sun and sizzling hot, shining a million times brighter. A giant eruption some 10,000 years ago created the beautiful, expanding shell of dust and gas seen here. The Hubble Space Telescope snapped an image of this particularly large outburst to commemorate the 31st anniversary of the Earth-orbiting observatory's launch into space. AG isn't the only massive, brilliant, eruptive star in Carina; see the AAS Nova article about its cousin Eta Carinae. [NASA, ESA, STScI]