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 -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.