A dark, starry sky fills the night above the Quarry Visitor Center in Dinosaur National Monument, which is celebrating the dark clear skies this week and weekend.RBC I The National Park Service invites visitors of all ages to join in the celebration of its 100th birthday throughout August, and with special events across the country and free admission to all 412 national parks from today through Sunday, the NPS is encouraging everyone to #FindYourPark/…