Joe, take a look at this:

http://antwrp.gsfc.nasa.gov/apod/globular_clusters.html

On Thu, Jun 11, 2009 at 10:48 AM, Joe Bauman <josephmbauman@yahoo.com>wrote:

Joe, were you referencing the APOD globular that had a lot of blue stars (APOD 2004 Oct 14, "Glimpse of a Globular Star Cluster)? That's a false color infrared photo, so blue probably just refers to short wavelength IR. Chuck said it all: The more massive a star, the hotter (i.e., more blue) it burns and so the shorter its life. For this reason, globulars are almost entirely composed of lower mass, older stars, mainly because they don't have much in the way of star-forming dust and gas. And that's because they're outside of the disk of galaxies. It's in the disk, specifically in the spiral arms, where star formation occurs. John R. Peterson

...

This makes me wonder if one of my basic assumptions is wrong. I thought all globulars were extremely ancient. But could a population of blue stars be as old as red ones? Can someone help me understand this? Thanks, Joe

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Message: 3 Date: Thu, 11 Jun 2009 12:38:23 -0600 From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Subject: Re: [Utah-astronomy] My new solar mount setup Message-ID: <2541d8030906111138n611656bv93a0e21b91f5f67b@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1

Kurt , does your own PST display ghost images near the edge of the FOV? Did you buy yours new, or used?