… Access to the Telescopes in the Observatory building is only open for ticketed events. Observatory tickets are required to be purchased in advance through Eventbrite. The Glenn and Carol Arthur Planetarium has a 36 ft projection dome, which hosts weekly shows – from traditional …

…d edition, July 1, 2008. ( ii ) [Reserved] [ 82 FR 27176 , June 14, 2017; 82 FR 28777 , June 26, 2017; 82 FR 30997 , July 5, 2017] § 441.40 Pretreatment standards for new sources (PSNS). As of July 14, 2017, any new source subject to this part must comply with the requirements of…