ESSENTIAL ASTRONOMY playlist: \r<br>\r<br>Google Tech Talk (more info below) December 1, 2011 Presented by Raja (Puragra) GuhaThakurta. ABSTRACT The lecture Our Place in the Cosmos explains .\r<br>\r<br>ESSENTIAL ASTRONOMY playlist: Google Tech Talk (more info below) December 1, 2011 Presented by Raja (Puragra) GuhaThakurta. ABSTRACT The lecture .
