Fil:Bok globules in IC2944.jpg

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Strangely glowing dark clouds float serenely in this remarkable and beautiful image taken with the Hubble Space Telescope. These dense, opaque dust clouds — known as globules — are silhouetted against nearby bright stars in the busy star-forming region, IC 2944.

Astronomer A.D. Thackeray first spied the globules in IC 2944 in 1950. Globules like these have been known since Dutch-American astronomer Bart Bok first drew attention to such objects in 1947.

But astronomers still know very little about their origin and nature, except that they are generally associated with areas of star formation, called HII regions due to the presence of hydrogen gas. IC 2944 is filled with gas and dust that is illuminated and heated by a loose cluster of massive stars. These stars are much hotter and much more massive than our Sun.
Dato (data acquired in 1999-02 and 2001-02)
Kilde http://hubblesite.org/newscenter/archive/releases/2002/01/image/a (TIFF image)
Forfatter NASA and The Hubble Heritage Team (STScI/AURA)
Tilladelse
(Genbrug af denne fil)
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.

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Captions

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Elementer som er med i denne fil

afbilder

GUM 42

Bok globule engelsk

star formation engelsk

star-forming region engelsk

H II region engelsk

emission nebula engelsk

dark nebula engelsk

Interstellart medium

Stjernetåge

medietype

image/jpeg

checksum

e234eccb6cfe56961c1a07092f793ff85d698da9

bestemmelsesmetode: SHA-1 engelsk

datastørrelse

1.681.392 Byte

højde

1.498 pixel

bredde

1.480 pixel

Filhistorik

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Dato/tidMiniaturebilledeDimensionerBrugerKommentar
nuværende19. jun. 2009, 19:01Miniature af versionen fra 19. jun. 2009, 19:011.480 × 1.498 (1,6 MB)TryphonHigher resolution.
19. feb. 2006, 13:21Miniature af versionen fra 19. feb. 2006, 13:21746 × 750 (90 KB)StanlekubBok globules in IC2944, as seen by the Hubble Space Telescope's WFPC2. Credits: NASA and The Hubble Heritage Team (STScI/AURA) Acknowledgment: Bo Reipurth (University of Hawaii) [http://heritage.stsci.edu/2002/01/index.html http://heritage.stsci.ed

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