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This Week's Finds in Mathematical Physics (Week 204)
In article ,
Ken S. Tucker wrote: Turning to the evidence, Dr. Baez provides a photograph of a nebula, 2.65 giga-light years away, I never said *this* nebula was 2.65 giga-light years away! Where did you get that idea? "1) NGC 2359, the nebula around the Wolf-Rayet star HD56925, picture at http://cfa-www.harvard.edu/cfa/hotimage/n2359.html" This photo has the resolution of a standard planetary nebula within OUR OWN GALAXY, that's typical of an old nova, NGC 2359 is only about 5000 parsecs away. It's not a planetary nebula caused by an "old nova", it's a nebula caused by a Wolf-Rayet star. For details, see: http://www.astro.umontreal.ca/~stlouis/IR.html I'll be very clear, the photo Dr. Baez has quoted, ie. photographing a *planetary nebula* in a galaxy over 2 giga-light years away is impossible with the Hubble apparture, (to the depicted resolution at 2 billion LY's). That must be a photo of a closer object. Right! And I never claimed it was 2 billion light years away! I just claimed it was a nebula formed by a Wolf-Rayet star. |
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This Week's Finds in Mathematical Physics (Week 204)
Is the proton really stable, or does it eventually decay?
Why is there more matter than antimatter? These two questions could be related.If the particle that causes a proton to decay was made of antimatter perhaps it decayed in the early universe along with the rest of the antimatter. |
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