While some university-run observatories are for student use only, there are others that allow visitors. Here are four observatories in Texas that welcome public visitors to stargaze. 425 Linden St, Keene, TexasStar parties are regularly scheduled for the first and third Friday night of each month. 16942 Ranch Road 2341 Burnet, TexasAvailable only for private viewings Wednesday through Sunday. County Road 124, Nacogdoches, TexasPublic viewing sessions will be announced on the SFA Observatory Facebook page.