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  1. #1
    brucegooglegroups's Avatar
    brucegooglegroups Guest

    Default sky atlas 2000 and pocket sky atlas M42



    I noticed that Sky Atlas 200O labels theta1 and theta 2 in the Orion
    nebula, and the S&T pocket atlas labels upsilon(?) 1 and 2 in the same
    area. Why is this?

    Also, with a 4.5 inch scope, in the middle of the Orion nebula, the
    three stars I am viewing are in the trapezium?

    Bruce

  2. #2
    Vossinakis Andreas's Avatar
    Vossinakis Andreas Guest

    Default sky atlas 2000 and pocket sky atlas M42

    The greek letter Theta is in the same place on the keyboard with the letter
    U. So maybe is just a print error due to lack of greek typeface


    "brucegooglegroups" <brucegooglegroups@hotmail.com> wrote in message
    news:f4bd6fac-5240-4bc6-87dc-02636a6fbc96@e10g2000prf.googlegroups.com...



  3. #3
    laura halliday's Avatar
    laura halliday Guest

    Default sky atlas 2000 and pocket sky atlas M42

    On Dec 13, 6:23 am, brucegooglegroups <brucegooglegro...@hotmail.com>
    wrote:


    Very probably. There are two that are close together,
    and you may not be resolving them.

    Laura Halliday VE7LDH "Non sequitur. Your ACKS are
    Grid: CN89mg uncoordinated."
    ICBM: 49 16.05 N 122 56.92 W - Nomad the Network Engineer

  4. #4
    Craig's Avatar
    Craig Guest

    Default sky atlas 2000 and pocket sky atlas M42

    Unless seeing is very bad or the scope is way out of collimation, there
    should be no reason he can't resolve teh 4 main trapezium stars. E & F,
    I agree they are tough. But not A - D.



    laura halliday wrote:




    --


  5. #5
    brucegooglegroups's Avatar
    brucegooglegroups Guest

    Default sky atlas 2000 and pocket sky atlas M42

    On Dec 13, 1:43 pm, "Craig" <CBobchin@My_SkinSBCGlobal.net> wrote:

    After looking at Starry Night, I may be viewing 1C, 1A and 1D.
    Clear Skies,
    Bruce

  6. #6
    laura halliday's Avatar
    laura halliday Guest

    Default sky atlas 2000 and pocket sky atlas M42

    On Dec 13, 10:43 am, "Craig" <CBobchin@My_SkinSBCGlobal.net> wrote:

    I've seen E and F in an 8" SCT under dark skies. It was kind of
    interesting to look and realize that there were more stars there
    than I saw from home. :-)

    Laura Halliday VE7LDH "Non sequitur. Your ACKS are
    Grid: CN89mg uncoordinated."
    ICBM: 49 16.05 N 122 56.92 W - Nomad the Network Engineer

  7. #7
    Odysseus's Avatar
    Odysseus Guest

    Default sky atlas 2000 and pocket sky atlas M42

    In article
    <f4bd6fac-5240-4bc6-87dc-02636a6fbc96@e10g2000prf.googlegroups.com>,
    brucegooglegroups <brucegooglegroups@hotmail.com> wrote:


    Those probably are still thetas. There's a script style of lower-case
    theta whose main loop isn't closed: it starts a little like a "u" -- or
    a "J" -- but the stroke ends in a high loop (representing the top half
    of the printed character). An upsilon doesn't have any loops or
    reversals.

    Here's an example, from a mathematical Greek font (you wouldn't use it
    for writing in Greek):

    <http://www.myfonts.com/fonts/bitstream/symbol/proportional/charmap.html>

    The usual kind of printed theta is in the "q" slot, while the alternate
    form I believe you're seeing in the S&T atlas is at "J". Also shown are
    variants of pi (at "v" in the table), sigma (at "V" -- used at the ends
    of words), and phi (at "j").

    --
    Odysseus

 

 

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