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Cosmic Spider is Good Mother


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#1    Waspie_Dwarf

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Posted 08 April 2006 - 02:34 AM

The European Southern Observatory (ESO) press release pr-13-06 is reproduced below:

7 April 2006
For immediate release

Cosmic Spider is Good Mother

VLT FORS Image of the Inner Parts of the Tarantula Nebula


user posted image
Three-colour image of the Tarantula Nebula in the Large Magellanic Cloud. The image is based on observations made on 10 February 2002 and 22 March 2003 with the FORS1 multi-mode instrument on Eso's Very Large Telescope in three different narrow-band filters (centred on 485 nm, 503 nm, and 657 nm), for a total exposure time slightly above 3 minutes only. The data were extracted from the Eso Science Archive and processed by Henri Boffin (ESO).


Hanging above the Large Magellanic Cloud (LMC) - one of our closest galaxies - in what some describe as a frightening sight, the Tarantula nebula is worth looking at in detail. Also designated 30 Doradus or NGC 2070, the nebula owes its name to the arrangement of its brightest patches of nebulosity that somewhat resemble the legs of a spider. This name, of the biggest spiders on Earth, is also very fitting in view of the gigantic proportions of the celestial nebula - it measures nearly 1,000 light years across!


user posted image
Inside the giant emission nebula lies a cluster of young, massive and hot stars, denoted R 136, whose intense ultra-violet radiation and strong winds make the nebula glow, shaping it in the form of a giant arachnid. The cluster is about 2 to 3 million years old. Several of the brighter members in the immediate surroundings of the dense cluster are among the most massive stars known, with masses well above 50 times the mass of our Sun. The cluster itself contains more than 200 massive stars.


The Tarantula nebula is the largest emission nebula in the sky and also one of the largest known star-forming regions in all the Milky Way's neighbouring galaxies. Located about 170,000 light-years away, in the southern constellation Dorado (The Swordfish), it can be seen with the unaided eye.

As shown in this image obtained with the FORS1 multi-mode instrument on Eso's Very Large Telescope, its structure is fascinatingly complex, with a large number of bright arcs and apparently dark areas in between. Inside the giant emission nebula lies a cluster of young, massive and hot stars, denoted R 136, whose intense radiation and strong winds make the nebula glow, shaping it into the form of a giant arachnid. The cluster is about 2 to 3 million years old, that is, almost from 'yesterday' in the 13.7 billion year history of the Universe.

Several of the brighter members in the immediate surroundings of the dense cluster are among the most massive stars known, with masses well above 50 times the mass of our Sun. The cluster itself contains more than 200 massive stars.


user posted image
Above and to the right of the central cluster, another cluster of bright, massive stars is seen. Known to astronomers as Hodge 301, it is about 20 million years old, or about 10 times older than R136. The more massive stars of Hodge 301 have therefore already exploded as supernovae, blasting material away at tremendous speed and creating a web of entangled filaments. More explosions will come soon - in astronomical terms - as three red supergiants are indeed present in Hodge 301 that will end their life in the gigantic firework of a supernova within the next million years.


In the upper right of the image, another cluster of bright, massive stars is seen. Known to astronomers as Hodge 301, it is about 20 million years old, or about 10 times older than R136. The more massive stars of Hodge 301 have therefore already exploded as supernovae, blasting material away at tremendous speed and creating a web of entangled filaments. More explosions will come soon - in astronomical terms - as three red supergiants are indeed present in Hodge 301 that will end their life in the gigantic firework of a supernova within the next million years.


user posted image
Some structures have the appearance of elephant trunks, not unlike the famous and fertile "Pillars of Creation" at the top of which stars are forming.


While some stars are dying in this spidery cosmic inferno, others are yet to be born. Some structures, seen in the lower part of the image, have the appearance of elephant trunks, not unlike the famous and fertile "Pillars of Creation" at the top of which stars are forming. In fact, it seems that stars form all over the place in this gigantic stellar nursery and in all possible masses, at least down to the mass of our Sun. In some places, in a marvellous recycling process, it is the extreme radiation from the hot and massive stars and the shocks created by the supernova explosions that has compressed the gas to such extent to allow stars to form.

To the right and slightly below the central cluster, a red bubble is visible. The star that blows the material making this bubble is thought to be 20 times more massive, 130 000 times more luminous, 10 times larger and 6 times hotter than our Sun. A possible fainter example of such a bubble is also visible just above the large red bubble in the image.


user posted image
The star that blows the material making this reddish bubble is thought to be 20 times more massive, 130 000 times more luminous, 10 times larger and 6 times hotter than our Sun. A possible fainter example of such a bubble is also visible just above the large red bubble in the image.


Earlier colour composite images of the Tarantula nebula have been made with other instruments and/or filters at Eso's telescopes, e.g. PR Photo 05a/00 in visual light with FORS2 at the VLT at Paranal, and PR Photos 14a-g/02 and 34a-h/04 with the Wide-Field Imager at the ESO/MPG 2.2-m telescope at La Silla.


Notes
The image is based on observations made on 10 February 2002 and 22 March 2003 with the FORS1 multi-mode instrument on Eso's Very Large Telescope in three different narrow-band filters (centred on 485 nm, 503 nm, and 657 nm), for a total exposure time slightly above 3 minutes only. The data were extracted from the Eso Science Archive and fully processed by Henri Boffin (ESO).


Source: ESO Press Release pr-13-06

Edited by Waspie_Dwarf, 08 April 2006 - 02:41 AM.

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#2    Glacies

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Posted 08 April 2006 - 02:41 AM

you never cease to please. i do love these astronomy articles, and the pictures are incredible.

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