The text and images in this article were originally published on April 24, 2007, and reflect information about the Carina Nebula available at that time.
STAR BIRTH IN THE EXTREME
In celebration of the 17th anniversary of the launch and deployment of NASA’s Hubble Space Telescope, a team of astronomers is releasing one of the largest panoramic images ever taken with Hubble’s cameras. It is a 50-light-year-wide view of the central region of the Carina Nebula where a maelstrom of star birth – and death – is taking place.
Hubble’s view of the nebula shows star birth in a new level of detail. The fantasy-like landscape of the nebula is sculpted by the action of outflowing winds and scorching ultraviolet radiation from the monster stars that inhabit this inferno. In the process, these stars are shredding the surrounding material that is the last vestige of the giant cloud from which the stars were born.
The immense nebula contains at least a dozen brilliant stars that are roughly estimated to be at least 50 to 100 times the mass of our Sun. The most unique and opulent inhabitant is the star Eta Carinae, at far left. Eta Carinae is in the final stages of its brief and eruptive lifespan, as evidenced by two billowing lobes of gas and dust that presage its upcoming explosion as a titanic supernova.
The fireworks in the Carina region started three million years ago when the nebula’s first generation of newborn stars condensed and ignited in the middle of a huge cloud of cold molecular hydrogen. Radiation from these stars carved out an expanding bubble of hot gas. The island-like clumps of dark clouds scattered across the nebula are nodules of dust and gas that are resisting being eaten away by photoionization.
The hurricane blast of stellar winds and blistering ultraviolet radiation within the cavity is now compressing the surrounding walls of cold hydrogen. This is triggering a second stage of new star formation.
Our Sun and our solar system may have been born inside such a cosmic crucible 4.6 billion years ago. In looking at the Carina Nebula we are seeing the genesis of star making as it commonly occurs along the dense spiral arms of a galaxy.
The immense nebula is an estimated 7,500 light-years away in the southern constellation Carina the Keel (of the old southern constellation Argo Navis, the ship of Jason and the Argonauts, from Greek mythology).
This image is a mosaic of the Carina Nebula assembled from 48 frames taken with
Hubble Space Telescope’s Advanced Camera for Surveys. The Hubble images were taken in the light of neutral hydrogen. Color information was added with data taken at the Cerro Tololo Inter-American Observatory in Chile. Red corresponds to sulfur, green to hydrogen, and blue to oxygen emission.
Featured Image Credit:
Hubble image: NASA, ESA, N. Smith (University of California, Berkeley), and The Hubble Heritage Team (STScI/AURA)
CTIO image: N. Smith (University of California, Berkeley) and NOAO/AURA/NSF
Fast Facts about the Carina Nebula
About this Object
|Object Name:||Carina Nebula, NGC 3372|
|Object Description:||Emission Nebula in the Milky Way Galaxy|
|Position (J2000):||R.A. 10h 44m |
Dec. -59° 53′
|Distance:||Approximately 7,500 light-years (2,300 parsecs) |
|Dimensions:||This image is roughy 25 arcminutes (53 light-years or 16 parsecs) wide.|
About the Data
|Data Description:||This color image combines many exposures from Hubble Space Telescope’s Advanced Camera for Surveys (ACS)* and NOAO/AURA/NSF Cerro-Tololo Interamerican Observatory’s (CTIO) 4m Blanco Telescope and MOSAIC2 camera. The ACS data was from the HST proposal 10241: N. Smith (University of California, Berkeley), J. Bally (University of Colorado at Boulder), N. Walborn (STScI), and J. Morse (NASA/GSFC). The CTIO observing team includes N. Smith (University of California, Berkeley), J. Bally (University of Colorado at Boulder), and J. Walawender (Institute for Astronomy/University of Hawaii). |
*A small area of the Hubble ACS image that was saturated around the brightest star in the field, Eta Carinae, was replaced with images from previous shorter exposures from Hubble’s Wide Field Planetary Camera 2.
CTIO 4m Blanco Telescope and MOSAIC2 camera
|Filters:||HST: ACS F658N (H-alpha+[N II])|
CTIO: ([O III] 501nm), (H-alpha+[N II] 658nm) and ([S II] 672+673nm)
|Exposure Date:||HST data: March/July 2005|
CTIO data: December 2001/March 2003
About this Image
|Image Credit:||NASA, ESA, N. Smith (University of California, Berkeley), and the Hubble Heritage Team (STScI/AURA)|
|Release Date:||April 24 , 2007 |
|Color:||This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope along with ground-based observations. In total, three filters were used to sample narrow wavelength emission. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:|
CTIO: ([O III] 501nm) – blue
CTIO: (H-alpha+[N II] 658nm) – green
CTIO: ([S II] 672+673nm) – red
HST/ACS: F656N (H-alpha+[N II]) – luminosity*
*The higher resolution, black & white Hubble image and the lower resolution, color CTIO images were combined using a technique that takes luminosity (brightness) information from the black and white ACS image and color information from the composite CTIO image. This preserves all of the higher-resolution detail from the Hubble data while rendering a color image representing the physical processes in this active region of space.