Ir al contenido

Archivo:Ngc 2440.jpg

Contenido de la página no disponible en otros idiomas.
De Wikipedia, la enciclopedia libre

Ver la imagen en su resolución original (644 × 644 píxeles; tamaño de archivo: 39 kB; tipo MIME: image/jpeg)

Descripción NGC 2440 is another planetary nebula ejected by a dying star, but it has a much more chaotic structure than NGC 2346. The central star of NGC 2440 is one of the hottest known, with a surface temperature near 200000 degrees Celsius. The complex structure of the surrounding nebula suggests to some astronomers that there have been periodic oppositely directed outflows from the central star, somewhat similar to that in NGC 2346, but in the case of NGC 2440 these outflows have been episodic, and in different directions during each episode. The nebula is also rich in clouds of dust, some of which form long, dark streaks pointing away from the central star. In addition to the bright nebula, which glows because of fluorescence due to ultraviolet radiation from the hot star, NGC 2440 is surrounded by a much larger cloud of cooler gas which is invisible in ordinary light but can be detected with infrared telescopes. NGC 2440 lies about 4000 light-years from Earth in the direction of the constellation Puppis.
Fecha
Fuente http://hubblesite.org/newscenter/newsdesk/archive/releases/1999/35/image/e (direct link)
Autor NASA and The Hubble Heritage Team (AURA/STScI)
Permiso
(Reutilización de este archivo)
Public domain
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.

Leyendas

Añade una explicación corta acerca de lo que representa este archivo

Elementos representados en este archivo

representa a

Historial del archivo

Haz clic sobre una fecha y hora para ver el archivo tal como apareció en ese momento.

Fecha y horaMiniaturaDimensionesUsuarioComentario
actual02:36 16 mar 2007Miniatura de la versión del 02:36 16 mar 2007644 × 644 (39 kB)ElembisHigher resolution.
19:59 9 abr 2005Miniatura de la versión del 19:59 9 abr 2005350 × 350 (15 kB)VlSimpson~commonswikiNGC 2440 -- Hubble Image

Uso global del archivo

Las wikis siguientes utilizan este archivo:

Metadatos