27th April 2013
Brian Koberlein on Google+ on Astronomy contains a number of interesting articles on current developments in astronomy and relativity.
Brian Koberlein on Google+
Added 21-Oct-2013: Brian Koberlein noted that he now has 25,000 followers in Google+.
Added 01-May-2014: Brian Koberlein now has 32.000 followers and 22 million views on Google+.