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  1. #1
    Sam Wormley's Avatar
    Sam Wormley Guest

    Default Astronomers studying 17 supernova remnants... a surprising discovery



    From: http://sciencenow.sciencemag.org/science-shots/

    Shadows.

    Astronomers studying 17 supernova remnants, both in and near the Milky
    Way, have made a surprising discovery. By analyzing the shape of the
    remnants--created when massive stars exploded--they could tell what type
    of supernova caused the debris cloud. As they reported recently in The
    Astrophysical Journal Letters, a supernova known as a type Ia--caused
    when a sunlike star in a binary system draws in too much gas from its
    partner--generates a remnant cloud that's nearly spherical. But when
    stars that are much more massive explode, their remnant clouds are
    asymmetrical, as in this image of G292.0+1.8, located about 20,000
    light-years away in the constellation Centaurus. (Photo:
    NASA/CXC/UCSC/L. Lopez et al.)

  2. #2
    LarryG's Avatar
    LarryG Guest

    Default Astronomers studying 17 supernova remnants... a surprisingdiscovery

    On Dec 23, 9:00 am, Sam Wormley <sworml...@gmail.com> wrote:

    There are other shapes that are both symmetrical and not spherical,
    such as the hourglass or butterfly shapes. Was there any correlation
    to these?

  3. #3
    Norbert's Avatar
    Norbert Guest

    Default Astronomers studying 17 supernova remnants... a surprising discovery

    LarryG nous a donc écrit :


    These objects are not supernova remnant, but planetary nebulae.
    There is no 'explosion' in such a case, only an ejection of peripheral
    layers of a star.

    --
    Norbert.
    ======================================
    knowing the universe - stellar and galaxies evolution
    http://nrumiano.free.fr
    images of the sky http://images.ciel.free.fr
    ======================================



  4. #4
    palsing's Avatar
    palsing Guest

    Default Astronomers studying 17 supernova remnants... a surprisingdiscovery

    On Dec 23, 2:40 pm, oriel36 <kelleher.ger...@gmail.com> wrote:


    Not quite right; the elements in our bodies and our planet AND our sun
    were all present in the molecular cloud from which they all condensed.
    Any heavy elements synthesized within the sun, either there now or to
    be synthesized later, will stay right where they are for a very long
    time... there is no mechanism to get them outside of the sun while it
    is still in a stable period.


    Pray tell, just how are you defining "stellar geometry"?


    I think it best to keep you private works private...


 

 

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