I recently stumbled upon Mike Brotherton's anthology of science fiction stories about astronomy, Diamonds in the Sky--free and online. It includes the following authors:
Jerry Oltion, Alma Alexander, Wil McCarthy, David Levine, Jerry Weinberg, Mike Brotherton, Dan Hoyt, Mary Robinette Kowal, Valentin Ivanov, Jeffrey A. Carver, G. David Nordley, Kevin Grazier and Ges Seger, Alexis Glynn Latner, and Geoffrey A. Landis.
I will look into its usefulness at a later time. Meanwhile, feel free to post your observations.