... Vendors . ... Online Registration . ... Warren Rupp Observatory . ... The Hidden Hollow weekend Star Party at Warren Rupp Observatory is back again this year . ... As in previous years, speakers, contests, workshops, door prizes and vendors (we all love new astronomy toys) will be set up in Sky Lodge, along with tables and chairs - just right for a conversation on some of the finer points of astronomy. ... This year, we are offering group rates for clubs sending 4 or more members to Hidden Hollow. ...