Fichier:NGC_7027HSTFull.jpg
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NGC_7027HSTFull.jpg (527 × 485 pixels, taille du fichier : 70 kio, type MIME : image/jpeg)
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Description
DescriptionNGC 7027HSTFull.jpg |
English: The Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer (NICMOS) has captured a glimpse of a brief stage in the burnout of NGC 7027, a medium-mass star like our sun. The infrared image (on the left) shows a young planetary nebula in a state of rapid transition. This image alone reveals important new information. When astronomers combine this photo with an earlier image taken in visible light, they have a more complete picture of the final stages of star life.
NGC 7027 is going through spectacular death throes as it evolves into what astronomers call a "planetary nebula." The term planetary nebula came about not because of any real association with planets, but because in early telescopes these objects resembled the disks of planets. This image is composed of three exposures, one from the Wide Field and Planetary Camera 2 (WFPC2) and two from NICMOS. The blue represents the WFPC2 image; the green and red, NICMOS exposures. The white is emission from the hot gas surrounding the central star; the red and pink represent emission from cool molecular hydrogen gas. In effect, the colors represent the three layers in the material ejected by the dying star. Each layer depicts a change in temperature, beginning with a hot, bright central region, continuing with a thin boundary zone where molecular hydrogen gas is glowing and being destroyed, and ending with a cool, blue outer region of molecular gas and dust. |
Date | (released) |
Source | http://hubblesite.org/image/627/news_release/1998-11; see also http://hubblesite.org/image/626/news_release/1998-11 |
Auteur | William B. Latter (SIRTF Science Center/Caltech) and NASA |
Autorisation (Réutilisation de ce fichier) |
Material credited to STScI on this site was created, authored, and/or prepared for NASA under Contract NAS5-26555. Unless otherwise specifically stated, no claim to copyright is being asserted by STScI and it may be freely used as in the public domain in accordance with NASA's contract. [1] |
Conditions d’utilisation
Public domainPublic domainfalsefalse |
This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag. |
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19 mars 1998
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Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
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actuel | 20 janvier 2007 à 22:56 | 527 × 485 (70 kio) | Bgvr | {{Information |Description=NGC 7027 |Source=http://hubblesite.org/newscenter/archive/releases/1998/11/image/d/ |Date=1998 |Author=William B. Latter (SIRTF Science Center/Caltech) and NASA |Permission=Material credited to STScI on this site was created, au |
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