RE: Geometric evidence of an old galaxy

> SN1987a was dated to 169,000 ly in the close by Large Magellanic
> Cloud.
> The rings which became visible long after the initial explosion was
> recorded were instrumental in obtaining a reliable distance figure.
>
> http://zebu.uoregon.edu/~soper/ImStarDeath/SN1987A_Rings.

I think that calculation relied on the speed of light, whereas the new
one does not. Not that there's any good reason to doubt the LMC
measurement, but there's even one less bad excuse to question the new
measurement.

-- 
Dr. David Campbell
425 Scientific Collections Building
Department of Biological Sciences
Biodiversity and Systematics
University of Alabama, Box 870345
Tuscaloosa AL 35487-0345  USA