[AZ-Observing] Re: The Crab Nebula - Enhanced Hydrogen Comparison

  • From: "Richard Harshaw" <rharshaw2@xxxxxxx>
  • To: <az-observing@xxxxxxxxxxxxx>
  • Date: Thu, 22 Jan 2009 09:25:57 -0700

George, at the last meeting of the Saguaro Astronomy Club, I did a short
presentation on the Orion Nebula, and then compared it with the Tarantula
Nebula in a side-by-side comparison if the Tarantula was only 1,300 light
years away instead of 180,000. Interesting to say the least! The Tarantula
would cover ALL of Orion, and cast shadows at night, and even be visible at
twilight. If you'd like a comparison picture from my slide presentation,
email me privately (rharshaw51@xxxxxxx) and I'll send it as an attachment in
the reply.


Richard Harshaw
Cave Creek, AZ


-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of George Barber
Sent: Thursday, January 22, 2009 9:21 AM
To: az-observing@xxxxxxxxxxxxx
Cc: Albert Levy; Arthur Piccinati; Az Observng list;
az-observing-bounce@xxxxxxxxxxxxx; Jerry Bonnell APOD; Dan Ward;
gallery@xxxxxxxxxxxxxxxxxxx; Joe Orman; John O'Farrell; Wayne Johnson;
Robert Nemiroff APOD; Peter Wehinger; Rik Hill; Sean Walker; Susan Wyckoff
Subject: [AZ-Observing] Re: The Crab Nebula - Enhanced Hydrogen Comparison

Wow!  It is amazing what some of you are able to do in the realm of
astrophotography these days.  Very nice details.

Is this what we would see if we lived, say, 200 light years away?  I often
wonder what the various astronomic objects we observe would look like if we
could live on a planet nearby them.  I have seen the Magellenic clouds, and
they look just like clouds, but then they are not exactly spiral galaxies
like ours.  Wouldn't it be cool to watch something like the Crab Nebula
rise in the sky, covering perhaps 50 times the diameter of the full Moon?
I'll bet it would be like your photo!

George



                                                                           
                                                                           
             Chris Schur                                                   
             <comets133@yahoo.                                             
             com>                                                       To 
             Sent by:                  Rik Hill <rhill@xxxxxxxxxxxxxxx>,   
             az-observing-boun         Az Observng list                    
             ce@xxxxxxxxxxxxx          <az-observing@xxxxxxxxxxxxx>,       
                                       gallery@xxxxxxxxxxxxxxxxxxx, Jerry  
                                       Bonnell APOD                        
             01/22/2009 08:24          <bonnell@xxxxxxxxxxxxxxxxxxxx>, Joe 
             AM                        Orman <joe.orman@xxxxxxxxxxx>,      
                                       Wayne Johnson <mrgalaxy@xxxxxxxx>,  
                                       Albert Levy <alevy1@xxxxxxxxxx>,    
             Please respond to         "John O'Farrell"                    
             az-observing@free         <jofarrell@xxxxxxxxxxxxxxxxxxxx>,   
                 lists.org             Arthur Piccinati                    
                                       <apiccinati@xxxxxxxxx>, Robert      
                                       Nemiroff APOD <nemiroff@xxxxxxx>,   
                                       Sean Walker                         
                                       <swalker@xxxxxxxxxxxxxxxxxxx>, Dan  
                                       Ward <danlward@xxxxxxx>, Peter      
                                       Wehinger                            
                                       <pwehinger@xxxxxxxxxxxxxx>, Susan   
                                       Wyckoff <wyckoff@xxxxxxx>           
                                                                        cc 
                                                                           
                                                                   Subject 
                                       [AZ-Observing] The Crab Nebula -    
                                       Enhanced Hydrogen Comparison        
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




HI all,

I present to you here the best shot Ive taken so far with my 12.5" newt of
the crab, M1.  The last time I shot this was when I had my ST7E, a long
time ago. As you know, the crab nebula is basically a continuum in the
core, surrounded by the emission filamentary structure.  This is much like
a spiral galaxy, so I applied my enhanced hydrogen technique normally used
on galaxies to this enigmatic object with great success.  As usual, I spent
a great deal of care making sure that the final colors are as true as
possible to the original calibrated RGB colors.  The results bring out the
lovely blue halo that rims the outside of the filaments as well.  I hope
you enjoy this image as much as I did producing it:

http://www.schursastrophotography.com/ccdimagepages/m1-4.html

Comments?
Chris


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