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News Release Archive:

News Release 32 of 214

February 15, 2012 01:00 PM (EST)

News Release Number: STScI-2012-12

Astronomers Watch Delayed Broadcast of a Powerful Stellar Eruption

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Image: Eta Carinae Light Echo

Eta Carinae Light EchoSTScI-PRC2012-12a

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ABOUT THIS IMAGE:

These images reveal light from a massive stellar outburst in the Carina Nebula reflecting off dust clouds surrounding a behemoth double-star system.

The color image at left shows the Carina Nebula, a star-forming region located 7,500 light-years from Earth. The massive double-star system Eta Carinae resides near the top of the image. The star system, about 120 times more massive than the Sun, produced a spectacular outburst that was seen on Earth from 1837 to 1858.

But some of the light from the eruption took an indirect path and is just now reaching our planet. The light bounced off dust clouds (the boxed region about 100 light-years away at the bottom of the image) and was rerouted to Earth, a phenomenon called a light echo. The image was taken in February 2000 by the U.S. National Optical Astronomy Observatory's Curtis Schmidt Telescope at the Cerro Tololo Inter-American Observatory (CTIO) in Chile.

The three black-and-white images at right show light from the eruption illuminating dust clouds near the doomed star system as it moves through them. The effect is like shining a flashlight on different regions of a vast cavern. The images were taken over an eight-year span by the U.S. National Optical Astronomy Observatory's Blanco 4-meter telescope at the CTIO.

Object Name: Carina Nebula

Image Type: Astronomical/Annotated

Credit: NASA, NOAO, and A. Rest (Space Telescope Science Institute, Baltimore, Md.)

Acknowledgment: NOAO, AURA, NSF, and N. Smith (University of Arizona)

NEWS RELEASE IMAGES

The above montage includes these images:

Eta Carinae Light Echo Region -- March 10, 2003 Image Type: Astronomical Eta Carinae Light Echo Region -- March 10, 2003 Eta Carinae Light Echo Brightening -- May 10, 2010 Image Type: Astronomical Eta Carinae Light Echo Brightening -- May 10, 2010 Eta Carinae Light Echo Brightening -- February 6, 2011 Image Type: Astronomical Eta Carinae Light Echo Brightening -- February 6, 2011 Carina Nebula Image Type: Astronomical Carina Nebula

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