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  1. #1
      Eiman
    Jul 2011
    -
    14,750

    ǡ ɡ "" ɡ 94 .

    ɡ 15 ( K = ޡ - 273 ).

    ɡ .

    ѡ .

    ϡ Hipparchus ɡ ڡ ݡ ( 2.5 ) .

    ѡ (4 ) ӡ ǡ ǡ 300,000 ɡ 10 (63,000 ) 1000 .



    ɡ 333,000 ֡ 100 8 % ӡ 8 % ɡ ɡ 1/80 (13 ) .



    ֡ ( 90 % ) ( 10 %) ɡ . 1200 32 .



    ѡ ɡ ɡ . ɡ .



    . ǡ " " ( "" ). .

    ӡ 5 % ( 1.5 - 109 ) ӡ 3000 50,000 ( 5800 ).

    .

    O - ( 31,000 )
    B - ( 9750 31,000 )
    A - ( 7100 9750 )
    F - ( 5950 7100 )
    G - ( 5250 5950 )
    K - ( 3950 5250 )
    M - ( 2000 3950 )

    :

    L - ( 1500 2000 )
    T - ( 1000 )

    OBAFGKMLT 9 O0 G . G2 .



    ɡ ɡ ɡ M K B O . . L T ɡ " " ( ).



    . 10 ( ) ǡ 0.8 . ( 0.8 ) 13 ǡ ǡ 13 .



    ( 0.8 10 ) ޡ ɡ M " " 100 . ʡ ͡ K . Al Debaran Arcturus . ( ) 10 % .

    Miras

    ɡ ҡ . ѡ " " ( ) ( Cetus) ɡ " " " " .



    ɡ ɡ ȡ ɡ ɡ zirconium .



    ѡ () . ޡ .



    ( ). . ( Procyon B 40 Eridani B ) " " ( " " ). ӡ ȡ . ֡ 0.8 10 ɡ ϡ ǡ ɡ ʡ . ( " ." ) .



    ( 10 ) ʡ .

    ɡ ɡ . Betelgeuse Orion Antares Scorpius .

    . ɡ ȡ ʡ .

    ʡ .
    .......

  2. #2

    Apr 2012
    343

    :



    (( ))

  3. #3

    Jul 2012
    5,302

    :



  4. #4

    Jan 2013
    6,984

    :


  5. #5

    Mar 2012
    157

    :


  6. #6
      Noor
    Jul 2011
    857

    :




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