Eta Carinae, one of the most massive and unstable stars in the Milky Way Galaxy, has a profound effect on its environment.Found in the South Pillar region of the Carina Nebula, these fantastic pillars of glowing dust and gas embedded with newborn stars were sculpted by the intense wind and radiation from Eta Carinae and other massive stars.
Glowing brightly in planet Earth's southern sky, the expansive Eta Carinae Nebula is a mere 10,000 light-years distant. Still, this remarkable cosmic vista is largely obscured by nebular dust and only revealed here in penetrating infrared light by the Spitzer Space Telescope. Eta Carinae itself is off the top left of this false-color image, with the bright-tipped dust pillars pointing suggestively toward the massive star's position.
Peony Nebula Settles for Silver Medal
If our galaxy were to host its own version of the Olympics, the title for the brightest known star would go to a massive star called Eta Carina. However, a new runner-up, now the second-brightest star in our galaxy, has been discovered in the galaxy's dusty and frenzied interior. This image from NASA's Spitzer Space Telescope shows the new silver medalist in the central region of our Milky Way.Dubbed the Peony nebula star, this blazing ball of gas shines with the equivalent light of 3.2 million suns. The reigning champ, Eta Carina, produces the equivalent of 4.7 million suns worth of light. However, astronomers say these estimates are uncertain, and it's possible that the Peony nebula star could be even brighter than Eta Carina.
If the Peony star is so bright, why doesn't it stand out more in this view? The answer is dust. This star is located in a very dusty region jam packed with stars. In fact, there could be other super bright stars still hidden deep in the stellar crowd. Spitzer's infrared eyes allowed it to pierce the dust and assess the Peony nebula star's true brightness. Likewise, infrared data from the European Southern Observatory's New Technology Telescope in Chile were integral in calculating the Peony nebula star's luminosity.
NASA
