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Hubble官网原文
Hubble Image of NGC 3324
The landmark 10th anniversary of the Hubble Space Telescope's HubbleHeritage Project is being celebrated with a 'landscape' image from thecosmos. Cutting across a nearby star-forming region are the "hills andvalleys" of gas and dust displayed in intricate detail. Set amid abackdrop of soft, glowing blue light are wispy tendrils of gas as wellas dark trunks of dust that are light-years in height.
The Hubble Heritage Project, which began in October 1998, hasreleased nearly 130 images mined from the Hubble data archive as wellas a number of observations taken specifically for the project. Byreleasing a new, previously unseen Hubble image every month, the team'sintent was to showcase some of the most attractive images ever taken bythe Hubble telescope, and share them with a wide audience. The Heritageteam continues to create aesthetic images that present the universefrom an artistic perspective.
This month's three-dimensional-looking Hubble image shows the edgeof the giant gaseous cavity within the star-forming region called NGC3324. The glowing nebula has been carved out by intense ultravioletradiation and stellar winds from several hot, young stars. A cluster ofextremely massive stars, located well outside this image in the centerof the nebula, is responsible for the ionization of the nebula andexcavation of the cavity.
The image also reveals dramatic dark towers of cool gas and dustthat rise above the glowing wall of gas. The dense gas at the topresists the blistering ultraviolet radiation from the central stars,and creates a tower that points in the direction of the energy flow.The high-energy radiation blazing out from the hot, young stars in NGC3324 is sculpting the wall of the nebula by slowly eroding it away.
Located in the Southern Hemisphere, NGC 3324 is at the northwestcorner of the Carina Nebula (NGC 3372), home of the Keyhole Nebula andthe active, outbursting star Eta Carinae. The entire Carina Nebulacomplex is located at a distance of roughly 7,200 light-years, and liesin the constellation Carina.
This image is a composite of data taken with two of Hubble's scienceinstruments. Data taken with the Advanced Camera for Surveys (ACS) in2006 isolated light emitted by hydrogen. More recent data, taken in2008 with the Wide Field Planetary Camera 2 (WFPC2), isolated lightemitted by sulfur and oxygen gas. To create a color composite, the datafrom the sulfur filter are represented by red, from the oxygen filterby blue, and from the hydrogen filter by green.
The Heritage project has released images using several of Hubble'soptical cameras: the Wide Field Planetary Camera (WF/PC), which wasinstalled when the telescope was first deployed in 1990; WFPC2, whichreplaced WFPC in 1993 and is still in service today; and ACS, which wasadded in 2002. After the Hubble Servicing Mission in early 2009, theHubble Heritage team hopes to continue using ACS as well as the newestof the optical cameras, Wide Field Camera 3.
For additional information, contact:
Ray Villard
Space Telescope Science Institute, Baltimore, Md.
410-338-4514
villard@stsci.edu
Keith Noll
Space Telescope Science Institute, Baltimore, Md.
410-338-1828
noll@stsci.edu
Nathan Smith
University of California, Berkeley, Calif.
nathans@astro.berkeley.edu
Object Name: NGC 3324
Image Type: Astronomical
Credit: NASA, ESA, and The Hubble Heritage Team (STScI/AURA)
Acknowledgment: N. Smith (University of California, Berkeley) |
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