Hi Mike, I think the distance is accurate; it's under 100 l-y away. Best wishes, Joe --- On Sat, 1/15/11, M Wilson <astro_outwest@yahoo.com> wrote:
From: M Wilson <astro_outwest@yahoo.com> Subject: Re: [Utah-astronomy] Cepheids To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Saturday, January 15, 2011, 7:13 PM Good article. Thanks for the analogy of the shark's fin in describing how the brightness chart of a Cephid looks. I have wondered how scientists were able to determine if the change in a given stars brightness was due to it's "pulse" or to the fact that a planet was passing in front of it. I think there's a problem in determing thru triangulation any star that's more than 100 light years away from us. Too often I have seen different distances attributed to stars in the 100 to 1,000 light year range, depending on publication date. I just wonder how accurate that 890 light year distance to Delta Cephi is.
--- On Sat, 1/15/11, Joe Bauman <josephmbauman@yahoo.com> wrote:
From: Joe Bauman <josephmbauman@yahoo.com> Subject: [Utah-astronomy] Cepheids To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Saturday, January 15, 2011, 1:54 AM
Hi Friends, My latest blog, about news concerning Cepheid variables and featuring a couple of great pics Patrick took, is up. It's at:
http://www.deseretnews.com/blog/47/Nightly-news-astronomy.html
Any comments are greatly appreciated. Thanks, Joe
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