Some of you might have seen my Facebook post when our 15 1/2-year-old rat terrier, Astro, died in October 2012. I’ve tried writing some posts about her this week to celebrate what would’ve been her 16th birthday on April 15. Not quite ready, I guess. Lee isn’t the only one having trouble getting used to a dog-free home. So I’m going to share that post with those of you who didn’t know Astro or aren’t connected with me on Facebook. Below it are some of my favorite images of her. Astro 1997-2012 Once called the world’s most photographed dog, Astro is no longer available for pictures. She was born in April…