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Pic Of The Day 29th Nov 03

Discussion in 'TOSAH Archive' started by Garp, 29 Nov 2003.

  1. Garp

    Capodecina

    Joined: 18 Oct 2002

    Posts: 10,573

    Location: Seattle

    [​IMG]

    Resembling an aerial fireworks explosion, this dramatic NASA Hubble Space Telescope picture of the energetic star WR124 reveals it is surrounded by hot clumps of gas being ejected into space at speeds of over 100,000 miles per hour.

    Also remarkable are vast arcs of glowing gas around the star, which are resolved into filamentary, chaotic substructures, yet with no overall global shell structure. Though the existence of clumps in the winds of hot stars has been deduced through spectroscopic observations of their inner winds, Hubble resolves them directly in the nebula M1-67 around WR124 as 100 billion-mile wide glowing gas blobs. Each blob is about 30 times the mass of the Earth.

    The massive, hot central star is known as a Wolf-Rayet star. This extremely rare and short-lived class of super-hot star (in this case 50,000 degrees Kelvin) is going through a violent, transitional phase characterized by the fierce ejection of mass. The blobs may result from the furious stellar wind that does not flow smoothly into space but has instabilities which make it clumpy.

    The surrounding nebula is estimated to be no older than 10,000 years, which means that it is so young it has not yet slammed into the gasses comprising the surrounding interstellar medium.

    As the blobs cool they will eventually dissipate into space and so don't pose any threat to neighboring stars.

    The star is 15,000 light-years away, located in the constellation Sagittarius. The picture was taken with Hubble's Wide Field Planetary Camera 2 in March 1997. The image is false-colored to reveal details in the nebula's structure.

    Credit: Yves Grosdidier (University of Montreal and Observatoire de Strasbourg), Anthony Moffat (Universitie de Montreal), Gilles Joncas (Universite Laval), Agnes Acker (Observatoire de Strasbourg), and NASA


    For a large version (606kb) click here. Also available as lossless TIFF (1.1mb) here

    Nov 28th 03
    10th Nov 03 Courtesy of Berserker
    09th Nov 03 Courtesy of Berserker
    08th Nov 03 Courtesy of Berserker
    26th Sep 03
    24th Sep 03
    17th Sep 03
     
  2. Markjcj

    Soldato

    Joined: 9 Nov 2002

    Posts: 5,457

    Location: Here

    Nice one matey.:)
     
  3. Biffa

    Man of Honour

    Joined: 30 Oct 2002

    Posts: 15,627

    Location: Surrey

    Ooh.. 4 stars coz theres a bit missing top left corner.....










































    heheh.. had you fooled :p
     
  4. MadFruit

    Mobster

    Joined: 24 Dec 2002

    Posts: 3,538

    Wow - thats really something mate. I love these space pics. Thanks for the post.
     
  5. Mad old tory

    Sgarrista

    Joined: 25 May 2003

    Posts: 9,361

    Location: Limehouse

    Hmm melikes :D